SWFA Shim Size

I took advantage of the tax day sale at SWFA site and ordered the 3-15x42 scope. I want to use some nylon washers to set the 0 stop as close to 0 as I can. In looking at some videos on how to do it I see I need washers that are .03 inches thick but I wasn’t able to find the outside diameter or inside diameter. Does any one have any info on this. I can buy a kit to do this but I can’t see spending $22 for a few nickel washers.
 
"DeutschKSK"Brian, why don’t you just get adjustable rings? I did that for my nightforce.. I can now use all 80 MOA to crank up to what ever distance I’m shooting at. SWFA scopes have over 100 MOA as well.. lots of room.
I’m looking to add a zero stop to the elevation so that way I sight the rifle in for 50 yards at 0 the knob will then stop turning when I get in the vicinity of 0 on the elevation knob. If my target is closer I use the reticle to get on target longer than 50 yds I have a choice of reticle or adjusting the point of aim using the knob on the scope. The main reason for this is so you can get back to a starting point that your familiar with and be back on target with minimal fuss and thinking as it becomes muscle memory automatic. I do use adjustable rings when I see the distance I need the scope to zero on is out of the scopes range. I haven’t decided yet which of my current rifles will be getting the new SWFA but I’m leaning towards the 16x42 on my Leshiy. No immediate plans on the 3-15x42 FFP.