Finally, my 9th bat has arrived last week and it is an SS Gladiator, the exact same one that you have, albeit, mine has 9 grains. Having gone through the pain of knocking for 9 bats, this is my experience:
Before Knocking in:
1. Top 1 cm of bat - Medium hard
2. Back of the bat - Soft
3. Handle - New and Stiff
This depends on how the bat is pressed. Some manufacturers like SG, GM press their bat harder than others. SS presses their bats moderate to light, but each Gladiator is individually pressed for performance, so, no two Gladiators are the same.
What you intend to have after Knocking in is a hard layer on top of the bat - especially Edges and Toe. So, the end result at the end of knocking should look like this:
1. Top 2 mm of the bat - Hard top
2. Next 8 mm of the bat - Medium Hard
3. Back of bat - Soft
4. Handle - New and Stiff
Step 1 - What I do is apply 3 extremely light coats of Linseed Oil - I avoid extratec during knocking in because I want to look at the blade directly while knocking in and look for myself as to what the mallet is doing. Also Extratec tends to dislodge near the edges if applied before knocking.
Step 2 - Very light knocking with a mallet - one so gentle that any harder will wake up a baby. The reason for this pass is not to knock the bat, but to understand the bat and to give you a feel of how the blade is pressed - there are times when the bottom is pressed more than the top of the blade.
Step 3 - Round of the edges and Toe - Starting gently, and increasing in intensity, I round off the edges and Toe. Spend about 30 mins on this.
Step 4 - Starting with gentle taps, slowly increasing the intensity cover the whole blade other than handle - don't forget the shoulder of the bat. Spend about 1 hour on this
I make it a point not to knock it too hard - the idea is not to spoil the expert pressing that was done by the manufacturer. A lot of people on the net promote hard knocking to the extend of denting the bat, I don't do that.
At this stage, the bat has a tough face, a medium hard top part and a soft back - which is what is exactly needed. You will notice that the performance would diminish slightly, but don't worry. This is time to put in an extratec and then head for nets.
This process is about introducing the bat to balls - start with old balls (junior size, 142 grams) for 30 mins, then old senior balls (156 grams) for 30 mins, then medium used junior balls (142 grams) for 30 mins. Repeat this for 3 days, then start with medium used senior balls (156 grams) and play for atleast 1 hour for the next 3 to 4 days. By this time, the bat is pretty much match ready. The end result is:
1. Hard Top face
2. Medium Hard Top part - exactly like what the manufacturer has pressed it for
3. Soft Back
4. Loosened and flexing handle with whip (this is because of use in the nets)
It is after the net sessions that the bat really opens up on performance, not immediately after knocking in. Infact, the performance detoriates ever so slightly immediately after knocking in