Enter the use of rock rings! I have played around on these nifty things at MooseJaw a few times and I think that they will do the trick!
I would really like to have one of the 3D training boards, but you have to have a good spot to put that up, and something tells me that the landlord would not like be mounting that in the wall!
Well, here they are:
Ordered them from MooseJaw on Friday.
PS, those people at MooseJaw are super handy and friendly. A great company with loads of character! Not a big box store with bland faces.
Have a great day.
I will let you know how these things work when they get in!