Tsands,
I had to do the same things with my plane. Drilling holes in wheels - I've had to drill holes out on 2 planes already. Most of the time they don't know what axel you will use so they make them smaller. The firewall problem I had on 2 fuselages however the second time I didn't want to send it back to them. Took me 20 minutes to drill a new hole.

I am on my 2nd Tiger 2 and love the airplane. I had to add about 3 1/2 ounces on the nose as a trike and 1 1/2 ounces as a tail dragger. You shouldn't need that much up front.

Except for the nose weight, these are small issues. I also have a VF Edge ARF which required about 3 times the work that you describe here and its a fantastic airplane.