Bolt PC mounts.

Landing gear mounts

1. Identify the parts. Lay out the left and right front/rear gear blocks. The rear crossframe is a separate single piece; its file name still contains X400, but its leading face belongs at X366.
2. Dry-fit the tubes. Keep the nose rail datum at X82. Gear stations are X340 and X410: 258 mm and 328 mm behind that datum. The crossframe begins 284 mm behind it. Dry-fit on straight 12/10 mm rails. Mark 40 mm on each gear leg; use the root datum, not the conical print-relief cavity, to set insertion.
3. Install the fasteners. Each strut fork uses one M4×16 and one M3×14 bolt, metal washers and locknuts. Heads are outboard; nuts sit in the open inner pockets. Do not drill the carbon rails. This view shows fork-to-block bolts; attach the rod ends and M4×35 pivots using the main build guide.
4. Mark the bond areas. Green bands mark the carbon inside the sockets: 48 mm per gear block, 20 mm through the rear crossframe and 40 mm at each gear-leg root. The mounts are hidden to expose these bands. Qualify the adhesive on the actual printed material and carbon, then bond in a straight alignment jig. Keep bolt pockets and strut joints clear.
5. Check the assembly. Refit the battery tray: its rear holes remain X400,Y±42 on the rear gear blocks. Check wheel alignment, fork access and both matching body panels before bonding. Let the adhesive cure before removing the jig; follow the aircraft load-test plan.

Cabin & wing-spar mounts

1. Identify the parts. Lay out the two continuous side trusses and the single receiver crossframe. The side trusses are mirrored; their wing cuffs point outward.
2. Dry-fit the tubes. Slide the four 12 mm fuselage rails through the trusses. Fit the 20 mm main and 10 mm rear center spars through the upper cuffs. Insert the two 10 mm tail booms from their X560 datum through the receiver crossframe. Dry-fit the aft frame and servo tray before any adhesive.
3. Install the fasteners. Use four M3×20 bolts: two per side, at X578 and Z±25. Heads face outward. Each bolt passes through an 8 mm truss web and a 4 mm crossframe flange, with a metal washer on each face and an inward-facing locknut. Check full locking engagement without crushing the printed faces.
4. Mark the bond areas. Green bands mark the 54 mm rail sleeves, 40 mm center-spar cuffs and tail-boom contact regions. Glue the fixed center spars to their cuffs; keep the removable wing joiners and their internal bores clear. The crossframe sleeve starts at X558, while the existing boom begins at X560: effective carbon contact here is 38 mm.
5. Check the assembly. Keep the main and rear spars aligned on the wing jig while the qualified adhesive cures. Confirm access to all four cage bolts, receiver wiring and the removable servo tray. Check the matching roof sections before closing the fuselage.

Motor & forward frames

1. Identify the parts. Use the continuous motor spider, X175 frame and the two ESC hangers. Their sockets retain the original four rail centers, Y±52 and Z±40.
2. Dry-fit the tubes. Start the four 12/10 mm carbon rails at X82, giving 60 mm contact in the motor spider. The forward frame starts at X158. Center the ESC hangers at X210 and X275. Fit the battery and ESC trays before fixing the rail spacing.
3. Install the fasteners. The four M4 motor axes are shown behind the mount. Verify the actual mounting pattern and thread depth against the purchased motor; use metal washers and the correct M4×0.7 engagement. Keep the shaft recess clear. Remove the propeller during all setup.
4. Mark the bond areas. Bond the green carbon contact regions after the trial assembly: 60 mm at the motor spider, 34 mm at the forward frame and 26 mm on the lower rails at each ESC hanger. Use the qualified adhesive; do not fill the motor holes, shaft recess or tray fastener seats.
5. Check the assembly. Check straight rails, motor clearance, lead routing and battery access before closing the body. Inspect the cured bonds and complete motor-vibration/load checks before considering flight.

Motor bolts are an axis/stack illustration only. Select M4×0.7 length from the actual mount thickness and the motor maker’s permitted thread engagement; the pictured length is not a purchase specification. Tray fasteners are listed in the main build guide.

Aft frame & tail booms

1. Identify the parts. Use the continuous X662 frame. Its leading tail-boom sleeve face is at X642; the four rail sleeves run from X645 to X679.
2. Dry-fit the tubes. Slide it over all four fuselage rails and both tail booms. Keep the original servo tray removable and check its mounting holes at X662,Y±46 before bonding.
3. Install the fasteners. This frame bonds to carbon; no bolt passes through a tube. Fit the original servo tray with its specified removable hardware. Those tray screws are outside this mount-only illustration.
4. Mark the bond areas. Green bands mark the 34 mm rail engagements and the two 40 mm tail-boom engagements. Bond only after the cabin, aft frame and tail booms align together. Keep the servo tray seats and holes clear.
5. Check the assembly. Verify tail-boom parallelism, servo horn and lead clearance, and access to tray screws. Use the full guide for the remaining tail stations and structural checks.