We are using WNG perimeter bolts instead of the original ones. First, make sure the plate is at the original/accurate location. Mark for the bolts with transfer punch. Drill for the bolt body. Drilling with the plate in is to double secure the hole location just incase the drill bit slips.
Here are the WNG perimeter bolts. The long bottoms go under plate. They can be screwed up and down to adjust plate height. The short tops are to lock down the plate. We cut a notch on the tip of each bolt and wax it for easy installation. The notch functions as a tap.
All the bottom parts are punched down now. We use are pressure instead of elbow grease. Is it cheating?
Next, modify the plate where perimeter bolts go in. The WNG bolts are flat with washers. The original counter sinks on plate need to be filled for the washers. Before filling, chase them with 1/2" drill bit for the new 1/2"ish bolts.
Wax 1/2" dowels, insert into bolt holes, maybe put tape on the bottom. then fill counter sinks with epoxy. Let dry over night.
The next morning, epoxy is dried. Sand flush by hand or machine. The middle picture shows a flat WNG bolt and washer. Now it'll fit much better on top of plate. Next, the plate can be sanded, sprayed with gold, and installed.