Your pages on the TG series don't make complete sense, you are obviously confusing two completely different aircraft; especially in the serial numbers you list. All the 42-nnnn are for the Training Gliders built in 1942 not the early teens like your pages list! Please refer to another site I found. http://home.att.net/~jbaugher/ which has extensive work on serial numbers.
for a picture of a Laister-Kauffman TG-4A (civilian designation LK-10) see http://www.iac.net/~feguy/VSA/cards/lk-10a.html 11/22/2000 @ 01:06 [ref: 1078]