I tried a putter with Liquid Metal on the head. I wonder if anyone knows about it. It felt great, very soft but accurate.

LM is a metal composed of numerous metal alloys. It was developed by two professors at California Institution of Tecnology back in the early/mid '90s. It's stronger and ligher than titanium with high elasticity. LM first produced driver in/about 1997 or 1998. I've one of the original 395/400cc driver, titanium body with LM face insert. The second generation was called PJ or Professor Johnson, the name of one of the two professors. LM used to sponsored Paul Azinger for a season or two. The original putters were anser style with polished or mirror-like finished (codes FA & F1). The original company folded but a few employees kept the golf product moving forward by forming LMG Sports, Inc. Putters by LMG used LM insert instead of full LM metal alloy, I think.

Yes, the putter is soft and is great for aggressive puttees. The original putters are available for a cheap price on Overstock.com

Thank you