Meg 225 solid flywheel choices

ok going to order flywheel and clutch tomorrow. Looking at engine dynamics one but before I do are they all same? Any better than others?
 
Rs tuning and kam racing both sell the ttv ones so ktec are talking pish!
 
Are ktec on our site giving discounts? Or is the 618 on ktec site what it costs?

I believe you give your forum membership number (click onto your profile page - your membership number is the 5-digit number at the end of the URL) and they will give you a discount.