Robobrew / Beersmith profile for small batch brews

G'day Gash,
I've been using your Robobrew Beersmith profile and mash profile for my 23L batches and found them spot on. I have got a couple of smaller (9.5L) kegs and looking to do some small batch brews. My question is regarding the Beersmith profile I should use.

I am looking to scale my existing recipes down to the smaller volume

Do I just adjust the batch size to 11.5L and estimated pre-boil volume to 19.5L in my existing Robobrew profile or do I need to create a specific profile for that volume and nominate that profile when using the SCALE RECIPE tool ?

Cheers

Cheers thanks for the Gash. I plan on a brew tomorrow and will run with the modified volumes in my existing profile. I wil see how it goes and maybe reverse engineer a new profile. I can always top up if the boil off is to much.

Had a crack at this today - brewed the Brew Dog Galaxy recipe you helped me with the other day scaled to 11.5L. I think the full grain bill for this recipe might have been a bit of a struggle for me in the RB anyway, but easy as at the smaller volume.
I used the original RB profile with the volumes adjusted down and it worked fine - 12(ish)L mash in was perfect. As you predicted, the only little issue was the boil off rate. The final volume was down about 600 - 700ml. All the other numbers were spot on resulting in an SG of 1.061
If I get a chance over the next few days I will do a test boil with water and measure the actual boil-off and create a small batch profile.
Thanks again for your help.
Cheers. Peter