Doesn't matter whether you spend alot of money or very little, the problem for system problems is inherent in retracts. Regardless of how much you spend you will probably encounter some problem or another at sometime. I prefer air systems to servo operated although they require plumbing. No matter what you use you will find yourself tweaking something on the gear eventually. Just deal with it, nothing is sweeter then a scale warbird cruising low on the deck with gear up. Don't be afraid of them. I recently bought the H-9 P-40 despite all the negative press on the gear, mine have been virtually worry free. Just remember not to slam the plane down and check for alignment often.