WOB Kiss BOV & changing the one way valves

colinicky

I have a Kiss BOV fitted to my Inspiration .I spent last week in Scapa & switched back to the standard Inspiration DSV half way through the week & really noticed the difference in WOB .
Now my BOV uses standard Kiss one way valves & I know that Brett at Divelife used to sell adapters that accepted the Inspiration one way valves & screwed straight onto the Inspo hoses but has stopped selling them
So my question is do the Inspo valves make a significant difference over the Kiss valves to the WOB ? & does anybody have a pair of adapters that I could beg, steal, borrow or even buy ?
TIA

__________________
Colin

I trust my rebreather completely ,
I just don't trust the user

onwards & downwards