I would guess that a 2100 lb aspire with front discs would stop just fine. Actually retrofitting though is probably not worth the effort.
Going to a larger vac hose may provide faster recovery, but it really doesn't add much to the stored vac. I think a better alternative may be adding a second vacuum tank. An extra tank, the size of the booster should double the number of pumps you have.
Maybe a vac gauge would be a good idea as it gives you a little warning that you are about to run out.
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