Extra fuel tank mount are not in manual & bolts AN4-25A are too short, AN4-27A used. Manual says rear keel to mast first. Flex, twist, shake and rock to get everything to line up. Now I see why.
M912 has longer reinforced keel so make sure to put rudder cable guides on SS plate before putting U-bracket on keel. Same is true for lower rear arm of landing gear U-bracket.
End caps on rear keel to mast tubes have 3/8 holes for 2 stroke motor mount supports and if used cap loose fit. Kit supplies two extra smaller 1/4 hole end caps and drilled to 5/16.
Will work on controls next before landing gear so I have clear path front to back on both sides.