MoTeC is essentially a top tier motorsports product that outperforms all other "hobby" ECUs in every aspect.

Is it easier to tune, absolutely not. I have taken some classes online for tuning and specific to MoTeC and still had issues. I got some help to get mine running and idling in a reasonable manner to at least move the car around and will be having an experienced tuner finish it off for me.

When I say full MoTeC, for me that is an M170 ECU and C127 Dash.

If you are interested in building your own harness, than you and I should talk. Depending what level of wiring you want to do, TXL wire, Tefzel wire,...? Than you will spend a boatload in tooling. I spent over $3,000 just in tooling to build mine and am about to open a tool rental business.