It will really depend on who is coming out to compete, have heard rumors but not many comfirmations.
AM600 - Kellen Hodgins just won AM600 with SOAR in a lost era bike, for 2017 he upgraded to Hornblowers last year's bike and he has done thousands of laps around GB so I think he will be a contender. However he just won his black numbers and I am not sure if he will ride pro or AM with CSBK.
I also think Kyle Newman would be at the top if he participated, he just got a newer bike but I haven't heard from him if he is going to race CSBK - I have raced against him and he is tricky and fast and solid at GB, he also raced endurance so has done tons of laps and seems to get faster against faster riders.
AM Superbike - Paul McIntosh won last year and every year he has gotten faster, he also did well at RACE last year but I am not sure how he will fair against National Racers. I also don't know if he will be AM since he just got his black numbers this season.
Pro600 - Hands down Mitch Card - I will be really surprised if anyone else won - Will H will be close but Mitch has always had the edge and he knows the track well.
ProSBK - Can never discount Rupert, I think he has won the last 100 years except last year when he got hurt at CSBK Mosport and Will Hornblower won but doubt it against the top guys, who knows.
Luke and Dylan Bauer (Dad and Son) are always fast at GB, Dylan has been impressive in the past 2 years and he has no fear for anyone.
Not sure if Mitch is competing in SBK - if he is he will probably finish 3rd hate to say as I would like for him to win.
It is really hard to say as AM SOAR racers tend to stay in SOAR so it's hard to tell how they will do on a national stage. Also I wasn't around in 2016 so my info could be out of date lol.
Thanks for the insight.
As for the AM versus PRO question, since Cherrypicker isn't around for a raging response, my opinion, since you all want to hear it, if your local club race license has the little indicator that says 'Pro', then sorry, you should be racing CSBK as a pro. Ok.....fire away.....