i haven't read through this thread but i'll throw my two cents....
when i moved my saddlebacks which were/are hosting a PLTA,hosting doesn't decribe what relationship they seem to have but anyways
i took a large juice jug,the ones with a handle and cut the top of it leaving the handle and gently uprooted the nem and slid him into the jug...and then sat and watched....the male went in right away and wallowed in the nem but the female was way more reluctant ...she watched that jug for 30 mins and all the time the male was in and out,finally she went in!!
then he came out,lol
after about 10 mins of them going in and out the both finally settled in to the nem and about 2 mins later i slowly covered the opening with a net and lifted the jug upright and out of the tank....they traveled like that(in a bucket of tank water)til i poured them into the new tank...