Seppel;
Perhaps you missed the last paragraph:
Now, you're done, right? Nope, not if you want to go further. If you are nice and comfortable with bombing as suggested above you will have noticed that there is no way to adjust the bomb interval if you use the auto-lock (i.e. hit the bomb switch and have just the first two bombs go, wait a couple of seconds then hit the bomb switch for the next pair and so on). There are "bombing tables" (i.e standalone mini-mods which will calculate intervals for you at given heights and speeds) for manual bombing. This is essentially repeating the procedure above without using the Bombsight Automation Key but releasing the bombs manually yourself. If you search M4T or SAS I believe they still have bomb tables program (or at least charts).So without the 'lock' aspect (which is essentially how the Norden does it) you follow the same procedure but to manually drop the bombs then you need the bombing tables which I mentioned will allow you to bomb 'manually' by letting you calculate speed vs height vs target size etc. Then you will be able to calculate your bomb drop interval (e.g. press every two seconds or every second etc etc).
As per Kopfdorfer's post, this little app will help you bomb manually:
https://www.mission4today.com/index.php?name=Downloads&file=details&id=317P.S. Don't forget the ASL altitude of your target in your considerations. If the target is a 100m ASL then you will need to adjust your bomb sight altitude to allow for the 100m difference otherwise your bombing accuracy will be off