I have been active on the Facebook forum and wanted to see what activity is on here. Peg printing is a very common issue because of the uniqueness of the vat tilt. This is what I do for my 130 and the Block Buildplate (what you have pictured).
My suggestion is to use a Dial Indicator. They’re inexpensive on Amazon or Harbor Freight. I would suggest a digital one that has a 0 reset ability. That would help you get it to within a 0.03mm accuracy.
Set the Z Reset position to 650 with a 1/2 inch Dial Indicator (digital one on amazon, if you get a different one you will have to figure out your best Z Reset position). Use the flat side of the indicator to put in the FEP vat where a peg would be printed (A for example). Adjust all Vat leveling bolts to the midpoint. Set the indicator to 0. Reset the Z Reset position by 2, single click. Reset it back to 650 and double click. It will rise, set the indicator into the next peg position (B for example). Raise or lower the bolt until it is 0.00. Repeat on all 4 pegs at least twice.
This is where it gets tricky. If you use the default Block Buildplate you have to eyeball where the best Z reset position is. It will not be exactly what it is listed, but it’s a good place to start. You have to continuously reset it until the vat does not sink with no resin in it. I use my fingers on the edge to feel if it pulls. As soon as it doesn’t, I begin the peg test and reaise/lower the Z reset position until all pegs print, and each are around 10.7mm. They should print at 11.13, no larger, if 100% perfect.
If you use the EZ Level build plate, you loosen all 4 bolts on the plate and lower it to the expected Z reset position. The build plate should not sink, but the plate should settle. Tighten all 4 bolts like you would a tire. Top Left, bottom right, bottom left, top right.
From here you would only need to manage the Z Reset position for PDMS and FEP swapping. No more calibrating. I have run this for 1.5 years and replaced FEP with a 0.1mm variation during that time.
If you’re unable to get a Dial Indicator you can do the same thing with a machinist block, or a squared block of anything. It would change the Z Reset level you use, and you would have to raise and lower it to your best judgement.
I find either of these methods to be simpler and less restrictive than the published method.
I’ll answer any more questions if you have them, hopefully this helps others.