(page 20-05 revisited) Landing gear service bulletin.........          

Since I've yet to acquire the finish kit, the parts I received to comply with the Main Landing Gear Service Bulletin consisted of a small additional bracket connecting the center channel to the newly beefed-up side skin (at least it'll be beefed up when I install it), skin doublers (and triplers), and some CherryMax rivets to replace the now-drilled-out LP4-3s and to install the doublers.  CherryMax rivets have approximately four times the shear strength of LP4s.

The complete kit for the service bulletin will include massively beefed-up bits which attach the landing gear to the center channel.  The end result will be a much stronger landing-gear structure, which should put an end to the wrinkled side skins which showed up on some -12s after hard landings (mostly on grass).

The yellow arrow in the picture shows the new bracket with CherryMax rivets installed.  Some builders report being able to set the stronger rivets with their existing pullers.  Not the case with me.  Neither the pneumatic nor the manual puller would work.  I therefore ordered the Cherry G27 puller (shown in the picture) which, of course, performed the task admirably.  I'm always looking for an excuse to buy a new tool.