Thanks for the comments, friends
@ Vinalssergio – well, when you print the kit, you choose the paper. Different publishers use different paper qualities. So, I would not generalize any conclusion. Halisnki paper is much to my taste and the printing method yields a more stable finish than a laser printer. Maybe an inkjet printer is better in this respect but I have no experience about…
@ Erik – being a biplane, this one has an extra lot of card parts! Regarding the landing gear, I’m pretty sure that the kit’s solution is strong enough. As you know, I very often make changes to the way landing gears are fixed.
For a change, I took several pictures of the upper wing structure assembly. Being thin, it is rather fragile. The weak point is in the middle. It is easy to “destroy” the dihedral angle.