Before I discuss your question: what is the model of the Warco horizontal bandsaw? While I could find room for the Grizzly 2x42 belt grinder, I could find room somewhere for a small vertical bandsaw if it's really as sturdy as that appears to be.
It's this one:
https://www.warco.co.uk/metal-bandsaws-metalworking-saws/303428-5-inch-bench-bandsaw.html
This model is pretty common everywhere as a rebrand I think.
It's a horizonal type; I got a local fabricator to weld me up a table with a support that can be held in the vice. The rear part of the blade housing is currently just resting on a 1/2"-ish bit of steel plate to get the vertical angle of the blade perpendicular to the table (happy accident that I happend to have a bit of plate the right size). It's very stable but I will have to mod the body and the blade housing to clamp the blade housing in a solid position now its being moved onto a different stand (the stand that used to hold my drill press).
weight & footprint of the new mill, dimensions of the top, details of the frame supporting the top, where on the top will the mill be placed and how you are "laminating the two 1" think plywood layers – two continuous sheets tightly glued would be stronger than the multiple piece layout you have
The weight of a Warco Minor (according to the contemporaneous manual Warco kindly sent me) is 160 Kg. The base is 330 mm x 440 mm.
The bench's frame is welded 40 mm box section (3 mm wall thickness), 1500 x 800 x 900 (the standard work bench design with a 40 mm box section shelf support about 400 mm up from the ground and a pair of evenly spaced 40 mm box section supports for both the shelf and top).
The 'bottom' 1" layer of the ply top is bolted to the frame all round and across the middle supports, and is one piece.
The top 1" 'front' layer (as you look at the picture) was glued on, clamped around the edges, and had various barbell plates (10 and 20 Kg) stacked along the middle, and fairly evenly brad-nailed to the 'bottom' layer all over.
The top 1" 'back' layer (again, as you look at the picture) has now been glued and bradded in the same way as the front.
I should say that the picture is taken from what will be effectively the rear of the bench; the side that will be nearly up against the wall.
There'll be a 6 mm steel plate 'sandwiched' in between the base of the mill and the ply with clearance holes for the bolts. There'll also be a pair of 6 mm plates (something like 500 mm x 100 mm each) running front to back, underneath the workbench top that the bolts will bear on to provide for a more solid mounting.
The mill's base will be mounted as far to the right (as you look at the picture) of the top of the bench as possible (whilst still allowing for full table movement, obviously).
As I said, the picture is taken from what will be the rear of the bench. So, from the user's perspective, the mill will be more towards the left of the bench.
Weight bearing is not something I'm worried about with the bench frame and top. The rigidity of the 6mm plate should be fine too. I guess what was in the back of my mind when I asked, was vibration damping.
My only milling experience is using me 7x14 with a vertical slide, so I'm bound to spend some time in 'chatter-town' as I learn. I suppose my lack of knowledge about ply's characteristics in regard to that prompted the question.
