So I've been looking at the QAD Ultra rest HDX lately but was steered towards this HHA Virtus rest which looks almost identical to the QAD. The shop guy said the main difference was the HHA uses gaskets to seal out dirt where the QAD doesn't. He said some guys have had issues with dirt making the rest stick on the QAD. Also the HHA is about $20 less. Any of you used the HHA and what are your thoughts?