Recipe inquiries

Depends on the dosage one is targeting. Take a look at https://steroidwiki.com/calculators/injectable-calc.php it explains everything in detail.

Thanks

BA 2%, BB 20%. Grapeseed oil and others are added according to the target concentrations. For standard doses this works just fine.

2 and 2, Haven't seen that ratio before.
You'd definitely be adding the carrier oil in at the start before heating.

2 and 20, i have edited my post. Thanks for highlighting.