I decided to buy the Diamond grinder RG 130 E-Plus, mostly driven by curiosity. I haven't seen this tool in person although I do have some uneven concrete floors at my shop that I'll be excited to try it out on. It looks like the tool is still available on Recon. Maybe they are unloading a bunch of them. There are some fairly priced discs on eBay for sale by Hartville Tool. For what its worth I offered $75 per Festool 768017 Diamond disc DIA HARD-D130 PREMIUM and it was accepted. I don't know what they normally sell for in the US. Hartville Tool is asking $100 per.