Thanks for the warm welcome ALASKANASSASIN! I don't have any experience with these but was looking at that Trucpack as well, they seem a solid choice but I guess you never know until you actually need and use one :)
Reviving this old thread, there seem to have emerged some very decent jump starters since 2014 - if they start 7 liter diesels they should do the same with some of our tractors...