I have about four T1's and one is one of the very, very big, very heavy types which i sent to SOG to get something fixed (can't recall what) but it resulted in the knife needing re-handled and was lucky enough to have the repair contractor offer custom scales instead of the Kraton and i accepted. Now, although i own two Tomcat II's, four Tomcat I's and two Tomcat III's i ALWAYS come back to that monster 'Cat and wanting it to be able to be opened one-handed (since i have a bad arm) but no one, and i mean NO one, wanted to even try.I understand b/c the 'Cat is a beast of a knife and it would be a tuff job planning and executing such a job. It'd be a leaf-spring type,i think, but drilling and installing the button seem like a particularly sensitive operation. A coil spring probably could even lift the blade. More likely it'd take a Mikov-like double-leaf-spring setup. Beyond that i'm not really well-educated on auto conversions to continue. I think a short re-issue of the Big 'Cat in auto would be a popular sell for SOG. A little help...?