Plus, balance shafts really are designed for absolute comfort in cars, so that people dont complain. If you do any modding at all, your car is going to do more vibrating. When I removed the balance shaft out of my 2.4, there was no noticable difference. Alot of cars dont even come with them, its the more expensive, more confort cars that you see have balance shafts, compared to the entry level cars. I think alot of newer ones do come with them though.
But yes, its something i’d always ditch when doing engine work.
–mark