Bolt PC · R5 hardware changes

Added cabin hardware: four M3×20 through-bolts, eight M3 washers and four M3 locknuts. Use the original remaining metal fasteners. Check that each locknut engages completely without projecting into carbon, servo travel or wiring.

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1. Print and dry-fit the motor mount, X175 frame, ESC hangers and all four gear nodes on the actual 12 mm carbon rails. Keep the original nose rail datum at X82.
2. Position front gear nodes at X340 and rear nodes at X410. Place the replacement crossframe leading face at X366 (284 mm behind X82); it ends at X386. Its four rail sleeves are 20 mm long; the separate gear nodes retain 48 mm rail engagement. The rear battery mounting holes remain X400,Y±42 on the rear gear nodes.
3. Fit the two cabin side trusses around the four longitudinal rails and the main/rear wing spars. Install the receiver crossframe between them. Add four M3×20 bolts, eight M3 washers and four locknuts through the holes at X578,Z±25, on both sides. Heads face outboard; check clearance to the rails. The 8 mm side webs mate to 4 mm crossframe flanges.
4. Fit the X662 tail frame and original servo tray; verify servo lead and horn travel before closing the body.
5. Use all six matching R5 center-roof sections and both R5 F02 body sections. Their clearance openings are required by the new continuous gussets and wing cuffs.