My situation is somewhat the opposite to yours. I don't currently own any gears or some sort as my previous bass guitar was seriously damaged several years ago. So I was idle. However, my guitarist often invites me to be a session bassist on his band since his bassist is sometimes not available for gigs. Since I don't own any, my guitarist usually is the one looking for at least a bass guitar for me to play. I also help but he has many, as in many connections than I do since he has been playing constantly and I/previous band stopped due to work-related issues. The gears I often used is owned by his bassist (one I subbed most of the time). We (me and the bassist) are really good and close friends. He has no problem with me using his bass guitar. My guitarist is now in a dilemma since I am more of a good player than his current. I am consistent and locked well with the drummer compare to our friend. I have groove which fits perfectly to what he wants with a bassist. And our friend is a little bit similar but far better than the phenomenon you described. LOL. He wanted me to be the permanent bassist and replace our friend. LOL. I do have an upcoming bass guitar (will arrive next week) and is canvassing for amps and pedals to use. I should be good to go by next month. The guitarist is the BL of the band I am referring to. He does not know how to confront his current bassist and I to am worried since the current bassist is also our close friend and had been using his bass guitar most of the time. LOL.