Its a very versatile mix accepting all manor of flavours from fish through to creams, depending on what type of flavour I'm using depends on what extra additives I will use.

My all time favourite flavour was Rod Hutchinson's Ulraspice flavour, but this is no longer available, although I'm lucky in the fact that I have 200ml left in my bait cupboard. But there are a few spice flavours still around, Nutrabaits do 5 different spice flavours as well as a few spice essential oils, Premier Baits have Bun Spice, Milk Spice, Indian spice and curry oil, CCmoores have Indian spice,Superspice,Rod Hutchinson has Megaspice.

For a spicy attractor package I always found it beneficial to add even more spiciness to the base mix with 10% of Spanish Pepper RRR being added.
 
Here is a spicey attractor package:

450 gms ProClassic

50 gms SpanishPepper RRR

5 gms Summer or Winter Amino Compund from feed stimulants (depending on the time of year)

6ml Nutrabaits UTC TechniSpice
 
20 ml Liquid Robin Red and Garlic or Liquid Robin Red and Chilli.
 
For a fruity bait CSL powder @ 5% and 10 ml of CSL liquid
 
475 gm ProClassic

25 Gms CSL powder

5 Gms Summer or Winter Amino Compound

2 Gms FruitStim, (feed stimulants)

5 ml Nutrabaits UTC Fruit Special

10 ml CSL liquid

20 ml Liquid Robin Red
 
Cream type flavours

When I want to use a cream type flavour Liver powder in Red Seed mix is an instant additive to add in my eyes, much the same with the ProNectar.
 
475 Gms ProClassic

25 Gms liver powder

5 ml Scopex flavour

4 Drops of Clove Essential oil

10 ml of Solars stimulin Amino or Rod hutchinson Regular Sense Appeal

20 ml Liquid Robin Red
 
The ProClassic can also be used to mix with other base mixes Mixed 50/50 with the fish Meal range of base mixes that Haiths Baits have on offer to really push the Robin Red signal within those baits the only base mix I would not mix it with is the ProNectar as you would be diluting the Robin Red content.