A tilting angle plate is a very useful accessory for your milling machine.
Most tilting angle plates, bought or shop-made, involve the use of castings.
However, a tool & die maker in Seattle sent me drawings for one he made from aluminum plate, which would not be hard to duplicate.
(Yes, aluminum would be a hopeless choice of material for an accessory of this sort in a commercial shop, but it’ll do fine in the hands of the guy who makes it for his own use.)
Note: these plans also include drawings for 5 other simple workholding aids for your milling machine table:
US Customers: US$10 ppd.
Canadian Customers: (includes postage and applicable taxes)
$10.00 AB SK, MB, QC, YT, NT, NU
$10.76 NB, NL, ON
$10.95 NS, PE