350 mile roundtrip roadtrip, my M818 hauling a halftrack to an event in PA. No issues at all, did well, but certainly slowed a bit on some of the steeper grades on I-81. The Halftrack is a post war Czech OT-810 converted to give it a WWII appearance, the StuG III is a replica built on the platform of a UK FV432 APC. Pulling about 12 tons track and trailer. Speed, 55 mph on flat roadways, one steep grade low of 28 mph, mid grades in the 40s..
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