Roller lifter preload

I think it was Shakespeare who said 'A lot of ado about nothing'.....

Run your lifters anywhere in the range that the collapsed lifter has. If the prod seat can be pushed down 0.200" until it bottoms, then your pre-load range is 0-0.200", but you should not go to either extreme, so a safe range would be 0.010" to 0.190".
Much ado about nothing!