First take the tech T stuff out and make sure the cyclone feed functions.
Unbolt the feed from the front of the marker and test its function with the hose connected but the housing and assembly seperate, if it does not function you had the bolt in so far it bound up (mostly older A-5's)
Check to make sure you purchased the correct JCS tube and that it has a cyclone feed hole and is installed correctly
If any one part of that trouble shoot fails you will know where the problem lies
Hopefully that helped and if it didnt post pics so we can see the problems
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