I would have to agree with Ray, just get two JLR motors, they are not very expensive, and i have had both a TZ and a D3R, and the JLR is way beyond either IMO. You could also just get one now, and one later, I would have to say it is a good idea to just learn to tune one motor while practiceing everything else, and you can apply that to your new motor, as a plus, the JLR is easy to break in.... Just read thru the tips in this forum, run the bottom end rich, and you'll be set....