Anyone had success with using multiple pumps for dealing with shorter pot-life resins?
I have a pretty decent dual-stage robinar 1hp vacuum pump (8cfm) which is pretty quick for my 5gal chamber but it is painfully slow for my 15gal (which i put entire molds into).
When vacuuming the whole mold i suppose i don't need to get to -29inHg, i really just need to get past 25, quickly, so i can lift the cover and pour more resin, etc.
I suppose there are other practical considerations, my current pump is 9A which means i have at most another 6A pump on the same circuit. I could use another circuit if it was necessary.
Is this whole idea silly? Should i bother getting another dual-stage? Single is cheaper and has higher cfm/$ but lower ultimate vacuum strength. Do i need to get a similarly sized pump or will anything i get be additive?