Time to Clamp Down

I have several record clamps that I use with my turntables, but I have a Thorens TD-160 with a spindle that is too short for a clamp to 'grab'. I have a very heavy turntable/record weight that probably weighs around 24 ounces, quite heavy. I would have no problem using that on one of my direct-drive tables, but I am skittish about using it on the belt-drive TD-160. Logic tells me it would put an extra-heavy load on the motor, causing undue wear.....is that a valid concern or not? The spindle clears the record just enough for this monster weight to work and right now it's my only option.
Thorens had a very heavy weight for their turntables.  I believe it was around $300.00 or so.  The Project heavy weight is around $100.00 and comes in a neat wooden box and is around 700-800 grams.  I used mine for a couple of years but now switched to the HRS weight which is a little over 380 grams.  
My clamp is 224 grams will grab any nub that protudes over the record.
I say that you have NOT exhausted all options.
Thanks for the responses....I believe there are something like 454 grams in a pound and if Pro-Ject marketed a weight of 700-800 grams, I should have no real concerns over this weight on my Thorens. It probably falls within thatrange....I bought it to use with my Denon DP-72L, but have to leave the dustcover in the up position to use it due to lack of clearance. It fits fine on my TD-160.
I meant options as far as what I have on-hand already, fuzztone. I have a couple of Record Doctor clamps which would probably work, but you have to install a doughnut at the spindle base to go with the clamp and I'm definitely not going down that road (removing the doughnut from one table to use on another table). I work hard enough threading my RTR tapes as it is, LOL.
I use an HRS record weight and outer ring weight on my Clearaudio TT with no extra wear