Hi there
You won’t crack a modern disc.
Grooved drilled or otherwise.
I use grooved and drilled Black Dismond disks.
In the past I’ve had pad pick up and warped a front disc slightly due to overheating on track sessions. This is nothing to do with the groove or drill holes. The groove cleans the pad and the drill holes dissipate heat.
Cracking a disc is something that used to happen years back but due to better machine processes and quality of materials it’s very very rare. people repeat this info through social media etc. But I challenge most to show evidence of modern discs cracking. I’m sure there are the odd occasions that it happens. ( people driving to the point of destruction)
But in 2021 it’s really a thing of the past.
As for EBC they had a rep as the cheapo end of the market for years through 80’s 90’s etc.
They did yellow, green and red stuff pads. They were seen as a bit hard a compound which needed heating up to get the best out of.
Move on in years snd all their pads have new technology and materials being used.
Still yellow green etc but different compounds now.
I have friends who have been pleased with them. But stigma has a way of sticking to a product and due to this I’ve never used them myself.
EBC have become a site sponsor here in SCN recently and there are discounts to be had using codes etc.
Ferodo pads are very good and they have a range for fast road and track based use.
Ds2500 is a decent pad with superb stopping ability, but suffer from over heating and damage when used hard on track with a heavy car like a Leon.
Great fast road pad.
For discs there are loads of companies from cheap to expensive.
EBC, Black Diamond, Tarrox, Mintex, Godspeed etc etc.
Hope that helps some.
Badger5 Custom Map + TIP,
3”Custom exhaust, FMIC, Bosh 550’s, BC
Coilovers, ARB’s +loads more.