Gibraltar GUBR Universal Post Mount Back Rest

I have a slightly old Ahead split seat throne that you can’t mount a backrest on (the newer ones have a bracket I think). So, I had to get one that mounts on the post. This was the only one that I found. Like most stuff, it was more expensive than it should be but it is built like a tank and very heavy ! Someone should smarten up and make drum stuff that is lighter weight- us old guys don’t want to keep trucking around hardware that weighs a ton! Can’t they use some space-age alloy or plastic that weighs almost nothing?