Ok, well, maybe 'conquer' isn't the right word. ;)
But I officially made my 1st wetbag tonight.
I made an oops on the left side- as I was turning everythig right side out, I tore right through the seam on that side (Doh!). Luckily this was only a practice one so I didn't worry about it being perfect or anything.
It was a bit slowgoing, as I kept checking & rechecking things, but I think the process will move rather quickly once I've made a few.