Cool!! Glad it helped!
And yes, in fact I do know the factory carb settings for this engine as well as the glow plug recommended. It will be in CEN Racings Nitro Handbook on page 7. For your convenience I will link it for you below:
CEN Racing Nitro Handbook
Look on the table on page 7 and find the GSR, Matrix Buggy, Matrix Arena TR (Corsa .28-.30)
In fact, the manuals for all of our cars are located on our "Downloads" page. Again, for your convenience I will link it below:
CEN Racing Downloads Web Page
The Nitro Handbook is a wealth of good, helpful information for any nitro engine, including some troubleshooting info on the last page!
If you have any other questions, please feel free to ask. You can reach me either here or by phoning me at the UK support number provided below in my signature between the hours of 3PM-8PM local time. You can also order spare parts thru that number if you would like. You can also order parts thru our online retail outlet found at the link below:
www.CENRacingDirect.com
All of the downloads will be in PDF format, so you will need a PDF reader. you can get a free reader from adobe as linked below:
Latest Free Adobe Reader