For those of you in the process of or about to assemble the GP .90/1.20 Stearman, there are several items of which you should be aware.
1. On pge 20 of the instructions, in the caption under photo #1: "...Install the engine mount with #8-32 x 1 1/4 socket head cap screws..." Unless you wish to have four holes punctured in you fuel tank, use one inch long screws instead. Or put a 1/4" spacer behind the engine mount as I did.
2. On page 28, photos #4 and #7 show the correct arrangement of the push rods internally and externally. On some models the two rod tubes exiting on the right side (left side, inverted) have been reversed and will cause the rods to cross and interfere with one another. Check for this condition before beginning assembly. Hobby Services will replace or fix the fuselage if you are not sure how to address this issue. (217)398-8970, then press 5. Ask for Cory.
3. On page 22 in the caption under photo #3: "The cowl ring should be flush with the top of the fuselage...". Don't rely upon this statement if you wish the side stripes on the cowl to be in alignment with the stripes on the fuselage. Dry mount the cowl and check for alignment. Mine ended up at 1/8 inch above the fuse.
4. On page 18 in the 3 photos above caption #9: The top photo shows the aileron connecting rod parallel with the wing struts. This angle increases in operation, bends the control horns and causes binding. To minimize this condition, I suggest the use of GP swivel mount ball links GPMQ3862 on the bottom ailerons with Esna-type lock nuts. The top can still use a clevis and disconnect there, leaving the bottom connected and laying across the wing for transport. Someone earlier reported that relocating the upper aileron control horn closer to the trailing edge (see that thread) improved the aileron's reaction.
5. On page 4 the red covering is stated as being "True Red". Mine is not...it is Missle Red.
6. On page 28 in caption #3 "Install and then remove two #2-56 x 5/8 machine screws." Should read: "#2 x 3/8 sheet metal screws...".
There are some other minor issues which I'm sure most can work out themselves.

Regards,
DrGO