No trick but the screens tend to come off the back of them and they can be a bugger to fish back oot of the carb body and not damage.
Maybe I'll just douche them out really well and keep my fingers crossed. Hate to be this far into it and not go all the way though . . . Ok to shoot compressed air in there as well?
Gens 1-3 the seat is easy to remove with a 10mm socket, but 4th gens have non-removable (as far as i know) seats pressed into place.