I've seen some discussions recently about how to best trim out in sidemount. A pretty vocal group has been those who don't believe in using trim weights to trim out in sidemount. While I agree that using trim weights is not necessary, I do believe there are instances where the use of trim weights can be much safer than relying on an air bubble or separate trim bladder to keep horizontal trim. Here's an article I wrote on this subject - Trimming out in Sidemount.