Shell on this weekend, tips tricks, trempro 635 x 5

[KZGoodchild]

Hey all, got the belly pan (new) back on this weekend, my neck hurts from all the creeper crawling, now I know why you guyus with the awesome shops turn them over to spank them back on...
Can't complain though, my welder is working in camp and let me put the frame inside his heated shop to do it ! Worth a good bottle of whiskey and a case of beer to boot !
So I've got my buck rivets (asst lengths, I assume a 1/8 " drill bit(s) will go through the old holes and through the new J channel, I've got 5 tubes of trempro, and a small crew coming over to lift, block etc....
I was thinking of building a set of jack stands on the inside using bottle jacks to raise/lower as needed..... How many buck rivets do you think I'll need to put in before I can take the jacks out???
Sorry no pics, too dirty a job !!!!
Cheers, and thanks, Mike