You will have a better conversation with anyone at a LBS if you take your S40 there - then they can see they would just be dealing with standard bike components and probably will not have any issues. If you try and have the conversation over the phone - they will instinctively stop listening as soon as they hear you say "recumbent".
I've definitely experienced this. I do all my own wrenching but didn't have the T47 BB tool when I bought my V20c. Called around and nobody had one and it was a week to get one over the internets so I thought I'd take it into a pretty highly regarded LBS. It went like this:
LBS: What is that? We don't work on those
Me: All I want is for you to install the bottom bracket.
LBS: We can't get it on our workstand.
Me: Showed them how.
LBS: I guess we can do it but won't guarantee the work.
Me: Go ahead, (thought: it's so simple nobody could screw it up)
An hour later they called and said it was ready. It was fine. I've subsequently bought the proper tool.
Note that while I was there they had cargo bikes, e-bikes, mountain bikes, road bikes, etc., all in the service area.
Sigh.