This seems to be working now. The calculators ive used say that RA (or R1) should be 0K. The circuit doesnt work unless i put a 1K resistor in. Ive tried a few lower values but the LED will go off after a set amount of time then not come back on. 1K doesnt give me a 50% duty cycle but it seems to be alright.

Once it was flashing correctly i changed the other values to what the calculator said and the LED came on but dimmer than usual so i assume its flashing really fast. I replaced with an IR LED and it now works over 2M

I hope it keeps working once its all soldered into a PCB :P