yeah, funny, this is my 3rd TSL. 1st 2 were stolen. When I bought this one, I wasn't aware of all the issues, as I never had any issues w/ mine. My last one got stolen in '04. So, I hadn't even thought about 1 for a long time. When I saw this one for sale, I didn't think to go looking for caveats, because the 2 I had were fine & I had no reason to look for warnings... Once I started looking, after the issue, I noticesd a bunch of footswitch issues, then I found that TSL site that describes the nightmare, before Marshall started issuing replacement boards. Now, the last one I guess is ISS 21. If things start to go downhill after this, I might just get ISS 21 & see if I need the bias board mod. If so, I'll assemble them before installing & go... I might then also do the Merc Mag trannies/choke too & it'll be a high performance TSL.