How difficult might it be to create longer and/or adjustable jacks for the front of games that don't use rails?

I'm specifically thinking of System11 games that have lots of crap on the backboards (Diner, Space Station, others) but the playfields are attached by that single pivot hinge. To work on these you have to lift the playfield out of the cabinet... if you're good you can lift and then pull the pf forward to rest on the pivot brackets, but then the pf may not have a clean place to rest on the lockbar. So I'm envisioning "pegs" or something you could clamp on the lockbar, while using your rear jacks.

It doesn't seem like it would be too hard, just wondering if you'd considered this? I'd be a buyer for sure if so!