Norm,
The two that I would bet on are the Queens,& Slots.
Spoke with both Shaun,at the 4 Queens,& Dan the tech at the Slots,just about a Month ago,& both stated they were getting new Strikes for the Convention. I know that Dan is capable of repairing the Machines,as I have been there when repairs were needed,& believe Shaun mentioned one time thats how he started. Point being,someone besides IGT has to know how to repair the Machines when they break down. The Cage Manager at the Orleans told me that was one of their reasons for quitting the Program. Repairs,& availability of Strikes,not the Collectors.
(Norman Clem)