Cleanworks
Moderator
I did originally. I just replaced the vac motors recently and forgot to specify the 2 in. The new ones work fine, but there is a noticeable difference in the air flow. I will order another pair and specify the 2 in. I may be building another one soon and am thinking of going with the 8.4's in parallel. Thet seem to all come with 2 inch openings. Vac's will be mounted with a similar manifold with no hoses. Just not sure if I am going to be able to run the pump with blowing the breakersDid you on your big aluminum beast build?