First feedback. I don't seem to have issues in locating the various muscles.
Vajroli bandha is easy enough to do, but it's challenging to completely isolate that muscle. If I initiate a somewhat strong contraction the anus gets also activated. Side note: it's surprisingly hard to do while on my back during yoga nidra.
Ashwini bandha is the easiest and I can contract strongly without issues
Mula bandha: I think I can do it, but it's hard to tell. I imagine to push my anus and scrotum towards each other. Again, extremely subtle sensation.
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On a separate note, this unfortunate medical condition led me to discover some interesting proprieties of substances such as resveratrol and quercetin. Potent stuff, if you manage to increase bioavailability. I'm now symptom free, if I discount a funny feeling I sometimes get in the pelvic floor area.
Another interesting data I collected, last week: a 3 days fast managed to get rid of all the symptoms (actually they were gone after 24h or so). Got them back with the first sip of coffee though.