In looking thorugh a catalog I noticed that they listed two type of blocks for Lasers (Black and Blue). The blue blocks cost a little more. Aside from the color what is the performance difference?
So, where is the text in the class rules, that exact do permit them, thanks (would help me)? To note: I am a bit "theoretical"/ "counting peas" here now, yes I know. But sailing some major events with the grey blocks and not haveing been asked by a measurer to change to the "Original builder supplied" ones (color blue black or violet) is not sufficient enough for me to claim: the grey ones are "persé" "class legal".
Holt has made various coloured laser blocks (blues, greys, black etc) over the years, they are all class legal and apart from colour they are identical. Recently, Harken has started to make the new class legal laser blocks and currently they are only made in black, these new blocks are roller bearing and run more freely than the Holt blocks and the traveller block unit is now a single piece meaning that you no longer need to tape the unit together. Overall, the Harken blocks provide a small performance advantage over the old Holt style blocks, but it will take some time to work out if they last as well.
All also add there are counterfeit (for the sake of a better term) Holt blocks on the market, which are obviously not class legal.