Lancs.
I used to use the SBS range of individual ingredients back in the '80s with no problem other than the hassle.
I have read here, or somewhere else, that there a lot of the 'Top guys' who are using the ready made type bait because they believe that they do not come any better. Now then, that said, I am not neccesarily saying I believe that, because sometimes they would wouldn't they. (Sorry for being cynical)
As Lofty hits upon in the 'Trigga' Topic, I believe that if it were not for people who make their own baits, there would be no forward movement and we would all end up using shop bought baits/believing what we are told. Not good for me.
I would just like to finish with a rather strange observation I READ about many years ago regarding Enzymes.
This writer suggested that the reason that Herons were very good fisher'birds'
is because of the natural Enzymes that were released by the birds' feet, whilst stood in the water, thereby attracting the fish to the area around the feet.
Do not read on if you are a very sensitive person. (or you have just had your dinner)
This guy went on to suggest that a good ingriedient for (Fish) baits might be, erm, how do I say this...Male sperm. This is because it also apparently contains lots of natural enzymes.
I am glad he did not reccommend a large amount of it.
I have never tried this, I must add, but it did open my mind to the possible sources (not sauces)
for natural ingredients in baits.
Imagine trying to roll that bait 
I did warn you.
Apologeticaly Axeman.