I`m building one too,,and also went with an OS pre-drilled mount for my OS10 going on it,it takes a lot of guess out.

My big plan is to "try" and put landing gear on mine,,But as I`m getting the fuselage closer to done,,and with No room on the firewall to mount the nose gear,,I`m having a little bit of trouble figuring how to do it.

I drilled out the enging mount "tongue" to accept the Sig aftermarked gear,,but am thinking twice as a bad landing might tear the firewall out.

If anyone who has built one with gear can chime in,,how did you do it??
Thanks
Rt4957