Hi John. That is a nice looking Tiger. I am going to go with the standard servos, ball bearing. As others have noted, we did not have all the fancy stuff a few years ago, and our planes worked quite well. A lot of folks tend to over power their planes and really jerk them around, and the power to weight ratio really goes out of sight, like putting some of the big gassers on planes that were not designed for them. This starts putting stress on a LOT of things in flight. I like to keep things simple and I put a lot of time into balancing before the first flight. If I was into air racing, 3-D, etc., I would not skimp on servos, but the pressure that is put on our servos depends on how we fly. If our imputs are smooth, there is not likely to be a lot of stress on our servos; anyway, that is my way of thinking. I will use a 6 volt battery to power mine on the larger scale planes. I have a one qtr. scale Sig Spacewalker that I have not yet flown. It has standard BB servos. Someone else built it. It has a two cylinder Magnum 1.60 four stroke engine.