Dual trucks

[Chet Kieffer]

Hello List,

I'm a newbie working my way through Randy Potter's course.  I have three 
old uprights in my garage that are in various stages of regulation, tuning 
and deconstruction.  With winter coming I want to move them around and I've 
been looking at these dual truck dollies that I can use on my own.  One is 
Roll-or-Kari and the other is by Jansen.  Near as I can tell the Jansen has 
swiveling wheels that can be locked and the Kari has swivels on one dolly 
and locked on the other.  Otherwise, they're equal.  Also special long 
straps will have to be required by either to get around an upright.

So I'm wondering if anyone has had experience with these devices.  Will 
they handle a heavy old upright?  Are there problems working around the 
casters?  Of course mine have some missing casters anyway which is the root 
of the problem.  :-}

Any ideas are appreciated.

Chet