Slave sensor or Dual synccord

My WA strobe setup doesn't work very well. I use a SS100A wired to the housing and a SS300 as slave via the internal slave sensor of the SS300.

The sensor of the SS300 doesn't see the primary flash in WA-setup (strobes far apart).

When my Ike D70 housing arrives, I want this problem to be solved.

I have two options to solve this:

Using a dual synccord, I don't prefer that because the strobe can't be detached underwater and my buddy can't bring the heavy strobe when entering the water (a lot of shorediving via slippery dikes overhere).

Or I use the (discontinued) Ike TTL-slave sensor, which give me all the freedom I want.

There is a third option: inserting an extra bulkhead in the housing, and connecting only the "ground-" and "trigger"wire to the first bulkhead, but than I have to drill a hole in my new housing :?

Is the slave sensor really that good, or is a hardwired system preferable?

Thanks,

Kees

I've used both the film and digital slave sensors for year. I had dual synch cords but always went back the slave sensor. I have found it highly reliable and one less cord.