From my experience, I agree on Stig with this, PCM is not a guarantee for succes, just covers a lot of trash untill things really go wrong.
Further more, stick to the KISS principle, I see many newcomers (And also opinioned pilots) who built there model full of so called safety equipment not knowing that the risk of failure doubles with every additional component installed.......

A lot of people will find this dangarous but I fly my jetmodels for 10 years with no PCM, no power-boxes, no dual battery packs etc...., just plain simple technique and there's a lot less that can go wrong. On the other hand, take maintenance very seriously, change fuel lines at least every 2 years, keep batteries fit with the delta chargers by deepcycling them once in a while, replace the main battery switch also once every two years and take a good look to all the components once in a while. My models are opened up every winter, turbine/fuel cels/landing gear/batteries are removed for inspection. Just a small summ of items, basically, use common sence and don't let everyone change your mind. A lot of "blamed" so-called mechanical failures could have been prevented if some maintenance was done....think about that! Good to learn from experienced modelers but you know how it is when at the field for the first time..........from the ten modelers there you get at least 9 different opinions how to alter things for the best result.......

Just my comments........good luck on your maiden!

Best regards,
Gerald