Rikki firstly you shouldnt of touched the timing as this would knock out the sync of the fueling and setup.
If you remember the fueling changed after a while of driving the car while we was testing it together.

Its possible the fueling has leaned off requiring to be turned back up and the timing set again. Problem is that you will forever need to be doing this. There are only 2 real options. Find a good working metering unit that does not requiring adjusting so often, which to be fair is quite hard now days + if you dont actually know this for a fact anyone could say or guess this.

Or the other is obviously fitting a management system that does not need constant tuning.

As your a small distance away id advise taking to a local garage and asking them to just check your static fueling AFR and let me know so i can give you better advise on what to do for the time being.

Regards