Betterley Tools ZC Table Saw Insert

Tip o' the hat to Geroge for mentioning this in my previous insert project!

I have gone through a lot of iterations for a zero clearance insert for my right tilt Delta Unisaw.
Oak, melamine, BB plywood, etc.

I made a router template so getting a tight fit to the saw is easy, but they do take time. I have a drawer of about 16 for various blades and saw tilt angles.
The BB ply is what I consider the "best" since it has proven tough and can be set perfectly flat with some sanding passes through my drum sander.
I wanted to try something even better so I made the 1/2" thick phenolic  plate which works perfectly, but I'd still have to make one for each blade type and tilt.
Visions in my head made me think of the universal inserts that take a simple insert plate that can be swapped out easily and would be a breeze to make and store.
I had some 1/2" aluminum plate which I could shape to fit, but being a bit of a slacker, never quite found my stash of gumption.

For about $100 delivered, the Betterley Tools insert had all the specs I was after for my dreamed of universal base plate.
$90 for the insert and $13 for shipping (bubble wrapped in a nice box).
This unit is 1/2" aluminum which is fully machined and dead flat, set up for 1/4" replacement inserts of 10" x 2"
Betterley also sells these phenolic insert-inserts for about $9 each ($35/4). I'll probably get a batch for my high use needs and make my own for the oddball blades.

Here are some glamor shots and features:

Top side

Has the slot for the Delta splitter and thumb hole lift
Two spring loaded balls on the side to force it over and take up any wiggle side to side. I might want to tighten it up in some cases and since the "slop" is only 0.020", some thin shim stock or card stock can be jammed in. Also about 0.020" fore/aft movement but no spring ball to restrict it.
Also has the rear anti-lift tab machined in:

Underside:

Comes with everything needed to install, screws (coated with non-permanent locking compound), and a hex wrench.

The blue sub-insert is also dead flat, but there are holes for adjustment:

Six flat head screws to lock down the blue insert, each with a pair of set screws to set the insert level with the red plate.
Set screws in each corner of the red plate as all need them to be flushed with the table.
The phenolic insert comes with a relief cut on the underside so the starter cut can be made with a retracted blade:

Fit on the saw shows how the blade aligns, plenty of room for a dado stack:

For use with my box joint blade set, which overhangs the arbor slightly on the left, might require a spacer to clear.
I can make my own inserts out of phenolic sheet, which costs about $20 for a 12"x12" sheet, but that'd yield 5 inserts with kerf waste so the Betterley insert replacements with the labor of shaping and drilling provided are not out of line cost wise. If the insert would not be subject to a lot of impact (box joint or dado set), some 1/4" bb plywood should also suffice.

Superbly machined, I look forward to using it!