simple trick for avoid a unit to gliiiide on terrain parts

just a small idea i've got :

i have problem with units gliding on my terrain grass hills, i think i am not the only one!

so apart having flat hills (that is fine, but, to my pt of view, less realistic and nice for a wargame table)
i've got an idea to share :
my unit have magnetic underside, so it's pretty slippery and very annoying when you try to place it on hill sides,
so i proceed exactly like in real world,
i take my cutter and without pressing the blade to hard (beware the blade! )
i make some longitudinal and diagonal lines on the magnetic underside...
easy, simple and it work ! (ok it depend of the angle of the slope but most of the time it doesn't glide anymore!)

i feel better now!