Check the listing for details. Gendon3 Lowercase modification kit for the Tandy TRS-80 Model I vintage computer. Listed at 45.00 USD. THIS IS THE MORE INVOLVED KIT FOR 3-LINE DESCENDERS. IT REQUIRES MORE TRACE CUTTING AND SOLDERING THAN THE SIMPLER RS-STYLE UPGRADE. Upgrades your computer to lowercase characters with 3-line descenders. It's been a long time since anyone made lowercase kits for the Model I so I thought I'd make some available. They comprise of a new character generator and double stacked video Ram chips to add the missing bit from the video Ram network. Instructions included. But to summarise, you need to be able to: Cut 4 tracesSolder 4 wiresRemove Z29 and install the new character generator (or if Z29 is soldered in remove it and install a socket)Remove Z45 and install the double stacked video Ram chips (or if Z45 is soldered in remove it and install a socket) Shipping worldwide will be $13.50