problem you may strike is that if you do not have sufficient ground clearance to allow the plane to rotate
Noticed this with snow take offs this winter. Harder to rotate for sure.
What if I put the wheels more towards the back of the fuselage than you have done? Move the pivot point back. The way you have them attached is exactly how I envisioned doing it. I'd like to bury a wheel in the nose too like on my penguin. I have some 2 and 3 inch wheels. What size are the ones you used?
Love the paint on your plane, BTW.
Some take offs were shorter but it was the result of hitting a bump and having the plane bounce into the air!
I once flew in a Beaver float plane at the end of an inlet with an outflow wind. Due to being totally overloaded, we couldn't taxi out far enough to turn back into the wind before dark. So the pilot turned it downwind and pinned it. Floats were underwater when we started. Eventually we started planing. Once the pilot figured we were close, he started looking for waves to "bump" us into the air. Took several tries but we made it. Our other option was leaving one or two soaking wet guys at the end of a desolate inlet for the night. No way to even light a fire. Not really an option. The pilot wasn't much into a sleep over either in his tennis shoes and t-shirt.