My latest trial... had a set of Luxilon M2 Pro 1.25 that I've never gotten around to using. Had a feeling this could be a great cross string to gut.
Initial impressions are very good: played 2 matches, and the string definitely is nowhere near the stiffness levels of usual Lux strings. Also, as with most Luxilon offerings, the surface is extremely slippery (they use teflon in their strings, right?), but the real kicker is that the comfort is also great.
As I've tried a number of poly crosses to Gut mains (From stiff ALU to buttery soft WC MB), the M2 Pro crosses have a great blend of that "luxilon control", without the usual harshness/lack of feel that I had found with ALU crosses. Not quite as soft or powerful as the MBite, but definitely a nice feeling stringbed that didn't require any break-in or display any noticeable performance drop over the course of two matches. I'll update any changes as they come.
Austrian PT280s, for almost 20 years.
Have yet to find something new with this buttery feel and precision.