I thought MM only sold them complete, but apparently they sell kits too. Not surprising now I guess, seeing as they are the same as TT.
They do produce other products too however, including more cloned hardware.
http://www.modemachines.com/en/products/
Mylo wrote:
And r 100a and r 100b they r also missing haha
Those are normally 2 tempco's (temperature sensitive resistors used to help stabilise tuning), they run in parallel. I think the original 303 only used 1, but that part was hard to find in the correct value, so the Adafruit design uses 2 alternatives in parallel to get the same resistance (nothing wrong with doing this).
If you look very carefully at your PCB, you'll see 1 side does have the part fitted, but a very small surface mount version instead. It was probably an easier/cheaper part to source. Again, the same thing has been found in TT x0xb0xes also (and now we know TT & MM is the same anyway). It's not a bad part I don't think. However, originally it is meant to sense ambient air temperature. A surface mount version will be more sensitive to PCB temperature instead. Im not sure how much difference it really makes, but if your tuning drifts more than you expected, then this may be responsible.