it will be sufficient to plug it on kernal socket and it will work without piercing the case and WITHOUT EXTRA WIRES!
How to handle switching between kernals?
The C16 will boot-up with standard kernal (I prefer always that on standard boot-up the machine seem not modified....)
the kernal will swap each time you will press the reset push button
(the original will become JDOS, or JDOS will become the original one), but reset via software will have no effect.
It's present also a jumper to choose the system standard: PAL or NTSC.
NOTE: the price includes the $ 8 that will be paid as a copyright at the conclusion of the sale.
This mod will be assembled on request.
22€ (8$ royalty fees included) + eventual Paypal fees + shipping cost