Springer precision 170mm extensions?

[surfr716]

I've been wanting to try my hand at open division so I decided to get a couple 170mm extensions for my m&p core. Seems like a relatively inexpensive way to try it out, especially since I already have the pistol for use in limited and production. 

I would have liked to have gone with TTI extensions for the job but unfortunately they don't make a 170mm extension so my options seem to be either Springer or Taylor. I don't really like the design of the Taylor but they seem to have a solid reputation and I can't seem to find any reviews good or bad of the Springer extensions. Has anyone tried them out on this forum or know anyone that has and is willing to share some insight as to their quality? 

[JWard79]

I have a Taylor Freelance 170 extension on my daughters M&P core, and it has been a reliable setup.  I don't believe Springer 170 extensions were available when I made the purchase.