I think this is a super idea I had one of these that was a roof rack for the car back in the day and it was invaluable and used it a lot.
Howerer it is each to there own and after removing 2 pins from vans the past couple of days using this without the need to lift anything was priceless.
Im not quite sure how the bag would help as the pin was quite low after sliding it out of the van! I just jacked it upto leg height and attached the legs, slid it almost fully out then jacked the front, pulled the van away and popped on the front legs. This was all on my lonesome with zero lifting letting me putting it on Garys wheel gadgets and rolling into my gamesroom. Before the Fatjack 3000 I would need a helper.
With the bag system it would require different size legs or maybe a hydrolic stool as that used to be my goto from the back of a van so thats food for thought if you ever encounter this. I do regurlary and with 11 currently set up in the house and 2 in the garage its easy justafiable in my instance.
Does the bag work on the back legs or do you have a few different size wodden legs or add a book or two? Again maybe a hydrolic bar stool may come in handy I gave mine to
@Chaggers.
Time is on my side im retired and have loads of it but crawling underneath setting up a Leg / Chair / whatever then pumping up im leaving to the patient chilled of the world. I want it done now no messing and I can slide under the pin and lift the back legs in about 5 second and drop just as quick all very smoothly.
Dont take this personal I am not knocking the idea and applaud your input of easy ways to lift pins and being honest I would have used your very idea had the FatMax Lifter not been released!
Since the official Pinjack was released I have been trying wood clamps and those cheap amazon copys but found them all terrible and like I said after trying the pinjack at pinfest @ $140 each (you need 2) it set me on this path.
Both our ideas are great it up to you to decide which path to take and money is an option for some albeit they seem to find 5-10k lying around every few month lol