I like this! Good work!

I don't have any of this equipment on hand but I have an upcoming project in mind that would need a similar setup; however, I have been researching how to invert one of the air-over-hydraulic style jacks (maybe even one of those so-called "long jacks") to be setup like yours and would be powered by an air compressor - so I can get quicker cycling times.

I've seen stuff on the internet that come painfully close but none like yours and especially none inverted that also has air-over-hydraulic functionality. Any ideas or pointers that would not involve a complete re-make of the jack? (Note to Admins: Apologies if this is not the correct place to ask this, please advise if not.)

Regards