Photo of the drill guide in SB-12-09-26 along with the plans showing already showing the holes and plugs.
Once again Mike’s creeper came in handy to roll under the fuselage and carefully mark the hole locations. The two hole locations on the right side were drilled using a tiny drill bit for a lead hole then bumping it up to #30. A step drill bit was used to enlarge both #30 holes to the required size of 3/8".
Using a metal ruler to mark the locations for the two required holes located directly under the right landing gear bolts.
About to use the step drill to enlarge the two #30 holes to 3/8".
Only got the right side finished because would prefer help sliding the workbench under the fuselage over enough to expose the bottom skin's left side for drilling.