I have what appears to be a swisco series 775 balance. I have 2 questions,
1. is there any way to do maintenance on these as some of them seem sticky and
2. I have at least 1 that needs to be replaced because the shoe does not hold, I remove the window and it retracts to the top. My balance is stamped with 34A with a 1-1/4 in shoe. I do not see that as an option on your page.