Mark,

Two things:

1. the leap from trainer to full on 3D machine is a big one, even with low rates. I would suggest doing something like the ultra stick, or go for a funfly like the cougar 2000, before going onto the UCD 46 etc.

2. Consider returning/selling the OS70 and stick with electric. If I was starting now, I would go 100% electric. I'm currently looking at the process needed to slowly reduce the number of engines I own and go electric.