That is ridiculous FBD!!! Did i read that right? Cylinder replacement for the O.S .61 is $92.00, while the cylinder replacement for the Tower hobbies .75 is only $32.00? I see O.S. game now...Its like paying for the complete package in a german auto, and only getting the reliability of a honda at most. To the origional poster i say go supertigre. If you get the O.S you wont feel like it was worth the extra $90. I started out even worse with a tower hobbies .46 and even considering the different complaints about it on the boards i now run it inverted on a H9 aresti with no trouble.