Cant speak specifically to the buttons you bought, but the ones I got (and I suspect they are all much the same) use an underside nut to tighten things up, letting you adjust from the buttons full length to almost nothing. For the IL translucents I got, that would be quite a range (prolly more than 1" to ...nothing). As a previous post mentions, the only issue is clearance under the panel. At the top, all is well. I'm just starting too, hope this helps.