Put another old crank in my os28 (snapped the other one) and took the HF to this bash spot. Lots of dried dam beds, rock beds, gravel pits etc. The os and the hf went great. Beat the crap out of them, nothing broke (for a change). Put about 10 tanks thru. The os still goes good for a 30+ lts engine with little compression. My tyres are now crap. getting very bald and losing grip. Need some badlands but aint got the dosh to buy them.
I will probably be still bashing the old HF in another few years. Probably will be the only one on earth still using one.