From Nils to Skills Uber Challenge - Compact Workshop Press

[Toolmaker51]

Wonderful. Design eliminates drill through channel, great idea.
A 32T jack is slooow moving, 2 things will help you. 1] scrap bucket might be full of shim stock, equals less pumping. 2] If there is room, make thick spacers for lower side of bed 1/2 distance between elevation holes. Sandwich a pair, drill straight through where they meet.