Seatback
This thing isn't by any means symmetrical as you can see by the pictures.
Other than that it's pretty and well thought out in design. The passengers side is way out on the bottom where it joins the floor pan causes a bump so to speak in the bottom of the door.
You can mold the door to the shape of it but it returns to its original shape as soon as you turn your back on it lol. When you marry this to the upper eyebrows you want to make sure on the pilots side that is forward enough so that the collective push rod doesn't rub on it or you may have to bend the rod so it will have free travel. That raises new issues to deal with you don't want to get involved with if you don't have to.
Aluminum access panels
For starters here you may find the patterns RotorWay provides in the kit aren't right if you make these parts from them.
Patterns are for general reference and not an absolute size.
We didn't catch this anywhere in the building books, videos or prints but found this out the hard way........by having to make parts over again so don't forget this or you will be doing the same thing.
We found the best way to make these parts is to obtain some poster board and make them out of it first to be sure everything is up to snuff before cutting the real thing.
When you cut the openings in the seatback don't do it by the book or videos or you will be in trouble
when you go to mount the ECU and the seatback brace tube. If you make the battery access panel too wide you can't correctly mount the ECU tray because the passenger side top mounting plate will be swimming in mid air.
If you cut the four upper access panels per instruction they will be to wide and there won't be room to mount the seatback brace tube.
We came up with a jury rig for this but we're not too happy about having to build our ship in this manner.
RotorWay should have come out with an addendum to warn you of this error but in the 5 years we've been involved were still waiting for it to come.