Hi!
I make my own too now and have used it pretty successfully in training and racing. I too have added SiS hydro tabs to improve the hydration element.
Essentially you just want a roughly 2:1 malto:fructose mix. Atm I’m using 50g malto and 25g fructose per 750ml bottle.
You can add a small amount of sodium alginate (about a gram scoop per 500ml bottle) for the ‘hydrogel’ element if you want. I’ve done it with and without and haven’t really noticed a perceived difference in terms of fuelling. If you do do it then mix it in to the powder rather than adding straight to the bottle.
Then add 1-2 hydro tabs per bottle and you’re sorted! 