I have a prolink HPF thumb on my TB153 6 ton machine. I love that thumb. I am not sure what that thumb would cost for your machine, and I doubt you could go Prolink on the smaller machine, but it is an excellent thumb. WB would be a more cost effective solution. I have had their thumbs in the past and never had an issue. I just have never really liked the geometry on the grapple portion of their thumbs. However I am kind of anal by nature so my issues may not be yours. If cost is a big driver, I would go to WB. They are well built and cost effective, if you don't have a coupler, their manual coupler is good at a reasonable price.