Need advice on STRAIGHT piping installation

[daz]

I'll remember that for next time. Thanks. This last try worked well tho by stapling one end and stretching it to the other end and stapling it there, then stapling all the rest in between. looks to be straight enough so that i can't really see any crooked parts. But boiling is a good idea and i'll try it next time i get some thats very crooked. This last batch from a different place wasn't that bad.