All Grain Virgin

Thing is you"ll be using salts to adjust your pH, well, you may be. I havent got my glasses right now and have buckleys of reading that hahaha ,I'll try and have a look later today when I get on my desktop.Cheers!

Ok I've had a look, for the last hour so ... trying play with your water.. and the pH is going to need be lowered, how much depends on how much mash water youre using and what grains.
I havent seen any purpose built single batch profiles, I've been working on one myself but its not quite there yet. For the time being just going have to lower the batch size in the profile. I can't help with volumes etc without knowing a recipe at least.
Your is challenging too, but we can probably get around that.
to give you a rough idea though I put in your water profile and 5.5kg of base malt and said 27L for mash. The pH without adjustments is 5.73. Now it would probably work fine like that, but yeah when people play with pH they usually want to get it down to 5.4 or something. I entered 300g of acidulated malt and it got it down to 5.48.

Im guessing you have a ph meter? It would be good to test it so you get real idea of where its at.

Thats just ph like you asked, without adjusting water. Where are you located?
You really just gotta dive in and give it a shot. I've run out of time this arvo, but will look again at it later. Cheers!