Hi. I am new to this forum. I am the avionics tech here at International Jets in Gadsden Alabama. We service and maintain about 70 L-39s in the US, Canada and Austrailia. We have started doing other types of A/C in the last year as well, but the Albatros is still our main stay right now. Anyway, more and more of our customers are getting into the "glass" cockpit thing. The problem is, some of the popular existing systems use AHRS units that won't stand up to the abuse an L-39 can give out (+8/-4 Gs, 200 degrees/second roll rate). While not all of our customers push the aircraft to these limits, there are some that do. In the past, when the only real option for a good EFIS was the Chelton system, they used aftermarket AHRS units; first the Crossbow which wasn't adequate at all, the the Pinpoint GADAHRS which is quite expensive but pretty much bulletproof. Since Chelton systems worked with an aftermarket AHRS unit, I am wondering if a Garmin or Avidyne EFIS would use something else besides the factory unit. What little info I have been able to get out of Garmin tells me that the G600 AHRS will handle the 200 degree/second roll rate but the data rate from the AHRS to the EFIS itself will only go up to 128 degrees/second which is totaly inadequate for the L-39. I also have a source that tells me that the new G3X system will use the same AHRS as the G600. I have several customers right now that would be interested in one of these Garmin systems if it had an adequate AHRS. So, I am wondering if I could install one of these Garmin systems with say, a pinpoint GADAHRS unit.