Hi,
the design for the TR300sc is fixed. The counterlung and scrubber is backmounted. There are a lot of OTS systems out of the market so there is no need to build another one
We just want an easy and lightweight desing, special for travelling.
We just like the "chest free" design. Is easier to maintain and to dive. Easy access to any D-Ring and therefor easy to handle an additional slingbottle.
The WOB of the TR300sc is good.