In the final mission, we got some new toys.
the whole trouble with that being the last mission is that once I learned the experimentals, I didn't get to play with them as before. Unfortunate!
I know! I completed the original missions waaaay before code missions or custom missions were available and I was soooo left wanting more!
In fact, once the editor was available I created my own map just so I could play with the experimentals (map 257, Unfinished Business).
The emphasis in my map is C-Bombs 'cos I like setting them off (!) but the DB is vital to the mission too.
Since then, there have been many awesome maps created which allow/require the use of experimentals.
It's a real trick to get the balance right with experimentals - they can make the game too easy/boring if used wrong - they need to be saved for special occasions.
For maps where you can play with experimentals, try:
Boss Mode, map 276
The Hotel, map 270
You Have To Fire The Beam, map 248
There are plenty of others out there too.