MartinHewitt's LG 3390
Regarding the manipulation ... I can only recommend to make a hole into back cover at the position where the lever nose comes down into the cam gate. That is partly covered by the fence lever control device, but it is possible to look below the FLCD to the lever nose. With this hole you can really have a look and understand how the FLCD works. There are variations in the locks which determine when the lever is lowered and raised. There are different contact points depending on the lowering and raising. The variations are not as big as in a 3330, but I believe they are exploitable when the reading is more precise. I hope a 1/16th of a number will be sufficient.
Martin Hewitt, Investigator Chronicles of Martin Hewitt