Key points :-
NEVER use a pump at the same time as injections as the vacuum and pull blood out of the injection site.
Yes if using a pump just for exercise it will go soft straight after removal. If using a professional pump for intercourse then the constriction ring goes on pump base. Get an erection and slide the ring off onto the base of your fella. Then release the vacuum and hey presto. There are different sizes of rings. Don’t be shocked if the ring hole is only like a polo mint …. That’s what is needed.
You could try Invicorp25 injections privately. Caverject never worked for me whereas Invicorp25 did. Hope this helps 👍