RE: roto start on a mammoth?
Who makes XTM/HPI engines?? I'm guessing that they have to have a common lineage if the back plates work, though it's odd that the XTM 2.47 is so well-regarded while the HPIs are kinda so-so.
Are they Italian? Japanese? Chinese?
Seems there are only a few "real" mfgs., just wondering who makes these.
Dean