Hello. Fairly new to r/c and need some input on some good .15-.45 2 stroke engines in the middle-price field. I have a good deal of older engines (Enyas .09, .15, .29, .35, .45 and Veco .19, .45, O.S. .25 and .30) but these are mostly engines from the eighties and while operational obviously probably a bit low on power and high on weight compared to their newer counterparts. Thoughts?