Yeah the studs aren't great on the crossovers, bit of an invisible flaw IMO - I had trouble with the front stud on my la101, mainly because I always use either an m1907 or a Ching sling as the stabilizer for 3-position target. The constant rotational changes was breaking down the stud thread over time. To fix it I simply drilled out the front stud
completely, countersunk the top side, and replaced it with a flat/cup-head bolt + pre-drilled a nut to clip the swivel on to.
BTW, was it the front stud that's stripped on your la102?
A few more details regarding this I documented in
viewtopic.php?f=2&t=7719&p=122167#p122167