It doesn't cause problems for those that run the Kilby skid. Some do put rubber on the sides of the tank to space it. Both ways do not effect any of the jeeps opperation or harm it. From experiance. Not reading it.
Well i have a EMP skid it has no dimple and i've had no probs and it is strong.
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
When I first got my Rubi I tried a Kilby steering box plate. It only protected about 1/2 the steering box, leaving the inside half open and unprotected. I wondered what trails have only 1/2 rocks that might do damage.
I returned it and made my own.
They may have improved them since.
While you are putting on a steering box skidplate, why not enhance the mounting for the box at the same time. The steering box mounts to a "pod-like-protrusion" under the frame. That "pod" has a tendancy to break off, or at least snap the welds, leaving you without steering. A skid plate helps, but doesn't prevent it from breaking.
Add a full plate along the outside and weld it to both the frame and pod. Add gussets to the front, rear, and underneath the pod to.
The cross brace from the box to the other side frame rail also helps, but the Ruby boxes are shaped different, cross braces don't work on them.
It's not a fun feeling when you realize you can't steer it.
It's no wonder the country is falling apart - stupidity abounds!