I havent used this one but comes out a little cheaper 332.00 for the same size scales that are in the kit. cdctools.com just look under dro and scroll down.
If you cant get ahold of the ebay seller to ask question on buying an item how are you going to return it when it comes in broken. I have been burned acouple of times on ebay (who hasnt) so I always ask a question if they reply I buy, if they dont respond I move on. Goodluck