Update README.md

README.md

@@ -85,6 +85,7 @@ For a keyboard with real buttons.
 on September 8, 2022. I finished my keyboard PCB, revision 1.1. I uploaded the schematic, the PCB production files, a Bill of material specifically for the keyboard, and a keyboard overlay (.PDF) which you can print out, laminate with transparent plastic, punch holes for the 40 keyboard plungers, and glued on top of the buttons.
 and a Bill of material for the keyboard with 40 keys a power LED, and solder pads for three flatcables, that are prepared so that they have wire ends with 2.54 pitch (every other wire with an 1.27mm pitch is not used) three flexcables are used with 5-wires 3-wires (for the LED) and 8-wires).
 revision 1.2 was made because there were some errors in the lettering below the keys, now the text "T Y U I O P" is corrected and the "10" was changed to "0", also the lettering was made a bit bolder. This change only pertains to the silk screen, nothing else has changed. so you can use the revision 1.1 BOM and KiCad files (you will need to edit the lettering though). If you already made a revision 1.1 PCB, no worries, the lettering is not needed when you use the keyboard overlay, and nothing else has changed. The copper text on the keyboard still reads 1.1. as copper was unchanged, only the silk screen was modified. Nothat when ordering the PCB you often have to give PCB dimensions for cost assesment, for the keyboard the dimensions (as said above) are 158mm wide and 64mm high.
+I also added the keyboard overlay, which previously was only to be found on my ZX81+35 pages, you can print this out (preferably in color)plastify it wit self sticking transparant plastic, it should fit exactly over my keyboard. You can then punch 40 4mm holes in it for long button stems, or use low profile, low travel keys and simply glue the overlay over the buttons and press on the buttons through the plastified paper.
 
 # optional cassette replacement device
 
@@ -124,3 +125,6 @@ If you also want to create my TZXDuino PCB, (a device that can read files from a
 when filling in the order detail, you should use the suggested default, like a thickness of 1.6mm, but you can order a different PCB color than the default green, but keep an eye on the price, as some options come with a price!
 
 If you order PCB's from China (PCBWay) then to pay for them there are numerous options, but if you don't have PayPal, or a credit card it might be that your only option is to order via Aliexpres, and that way is a bit strange. Simply set they paymethod, and the mailing option to aliexpress, and order, note down the price, then you will be transfered to aliexpress to a web-page where your PCBSeller has a sellers page. but note that instead of the noted down price, they quote a very low price, normally one dollar. Now they will give you the option to buy more than one item, increase the numbers of items you want to buy untill the price for your order is the same as the price the PCB manufacturor asks for, so say the PCB manufacturer asks for euro 47.50 then increase the number to 48, so the price becomes euro 48 then continue to order.
+
+# Various enclosures are possible #
+there are 3D designs available to 3D print a zx-81 case, or you can use a real ZX-81 case from a defective ZX-81. Another possibility is to design a wooden case, either from thicker wood, or from 4mm thick plywood (laser) cut and glued together, or as one user did make one from LEGO! you can download a lEGO design from here: https://rebrickable.com/mocs/MOC-129979/akilling/lego-case-for-zx81-plus-38/#details