A1200 Boards and Floppy Questions.

[Oldsmobile_Mike]

Check this out if you want to use a different keyboard (pic attached).  I've never used one personally but seems like a neat idea.

https://www.ebay.com/itm/Wireless-favourite-USB-keyboard-replacement-for-AMIGA-1200-/172642765068?hash=item28324f890c

3.1 ROM's can be had for under $20 USD from sites like AmigaKit and ebay.  Definitely worth it (IMHO) as they contain various bugfixes and may work better with certain accelerators.

https://amigakit.amiga.store/catalog/product_info.php?cPath=40_99&products_id=62

Good luck, have fun!  

[Oldsmobile_Mike]

AFAIR there's no conversion process to take a PC high density drive  (1.44MB) and use it as an Amiga 1.76MB drive.  Most of the instructions  out there detail converting standard double density (720K) drives to  Amiga (880K).  Making a HD drive that can natively read & write  Amiga HD format is going to be pretty tricky, but good luck!  

[Oldsmobile_Mike]

You can buy replacement LED's on Ebay.  Or, as you mentioned, you could repair your own.

[Oldsmobile_Mike]

Also found a A1200 Ram expansiopn with 8mb sim and fpu. No sign of crystal for FPU though, are these available and how do I know which I need?

With most trapdoor expansions if there's no separate crystal then the FPU will run at the same clock speed as the CPU.

Any thought's on the keyboard?

Clean, tighten, try again.

Also I notice on workbench while the picture is great over scart (sound test not as much, might check the soldering on the lead though I guess it could also be the ports)

Bad sound = a sign of failing caps.

This is certainly good enough and I am scared to use modern LCD's at 16:9 after seeing sooo many horrible stretched video's on yourtube etc. And people calling them out claimed the TV could not alter the stretch which scared me the most! (Though I suspect they just did not know how to!).

A good TV, properly connected, can be set to display proper 4:3 aspect ratio screens (not stretched).  Just you'll have black bars on the left and right sides of the display.