wouldn't you know it when I'm broke a nice 4" couple jet comes up for sale on eBay.
has a pump but I would use my keene p180 has a old Teledyne air compressor
helped my Dad replace the diaphragm on his in the 1970's, what I learned to dive on.
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Roger has that he’s a stand up guy. I got my 4” Proline from him and he even shipped it to Oklahoma. I have gotten a bunch more equipment from him also. Might be worth contacting him outside of eBay could net you a better deal.