ORIGINAL: aerobob

Because they didn't update the instructions until the third run of the fixed gear version. The holes and blind nuts are already installed, the gear is pre drilled.

The thing to watch out for is the CG in the instructions. It states an incorrect measurement. On three flying versions, all with the CG at 198-200mm aft of leading edge at the fuse side, they are the most neutral. DO NOT use the CG in the instructions.

Also - firewall to spinner backplate dimension is 154mm. And the vertical line offset is not shown; scribe a vertical line on the firewall 7mm to the right of center, as you are looking at the fuselage, upright. This is important to re-center the prop on the thrustline, as the firewall is offset for right thrust. If there is a plywood "box" bolted/tack glued onto the real firewall, remove it, if you're using any of the competitive engines. Otherwise, you will not get the engine located properly. I bolt the Hyde mount right to the main firewall, NO "box" included.

Finally - check that the stab and wing tubes are "square" to the rudder hingeline (perpendicular). Mine have been off some, requiring some adjustment of the tube holes in the fuselage vertically as and where needed. It's easy; just need to verify.