carlnpa,
I have been using Igus products for years. You will find many posts both positive and negitive about them. I for one am one who would tell you to go for it. In fact in the last few days a thread was posted and some very positive results for some other users. They now have a new line out, its the wq line (I think wq or something like it) and uses a square rail and new bearing inserts and looks like some good stuff. I was thinking about getting a couple rails and bearings and doing some testing. I have used Igus with much success and very pleased with the product and the price. No, they are not THk but they are very affordable and have some outstanding load specs.
You can contact them and get some sample stuff too. My opinion is you will be very happy with them. Good luck.
Glen |