Nice lap Sanjin, some nice saves in it as well, great car control! I think you struggle at times with the rear being snappy!? If you can make the car more predictable you might gain some more time.
Personally I don't like to drive on the bump runners too much. I am not sure you need it (especially rear).
BRM is without a doubt the slowest car overall. But the main problem most have, is to get the car working within the narrow powerband and using 6 gears.
Few years back, when I had about the same ranking like you Sanjin, I'd never believed to get a sub8 in BRM. I was stuck on 8m06s or so. There are no shortcuts, you need to know where and what to improve. Nowadays, everytime I hit the track I recognize what I do wrong and what I can do better. Also more experience in the BRM will help. In general most will have driven that car the least. There is no end to the learning curve in GPL.