Hi, I am a former competitive monofin swimmer (for speed) and occasionally do some freediving now. I found that a neck weight dramatically improves the distance I can achieve in dyn and dnf. However, the neck weights I tried (C4 Dyno, Lobster) are not compatible with an optimal hydrodynamic position, because they prevent me from bringing my arms close enough to the head. Do you know of different options that I should try?