GPR offers a rotary style for GT, check their website
I'm actually at Wendy's eating lunch waiting for the engineer at GPR to get back from his lunch. Having them check on making brackets to fit the SC1K. I told them I think there is a market for them, albeit smaller than other Ducs out there, but id think more than a GT. more to come soon.
Nice work - thanks! I'm looking forward to hearing the result.