Thanks again Bill.
There is no gain as in achieving the 'steady state' water is taken on to maintain trim - as this does not directly
replace the soil and is held in special ballast tanks replacing a volume of air already present. Hence no gain. OK.
For some reason I imagined that a disposable should/would impact on performance.
But hey weapons are disposable so the same principles hold good.
Now if the soil was held in 'drop tanks' an EB would'nt be necessary - drop and soar eh ?
Save your air for a better day !