The single handed F16 has a SCHRS rating lower than the double handed. That's the rating of the box rule. If your boat is optimized to the rule like the Blade, the Falcon or the Stealth F16, that's your rating. Now if your boat is measured and it turns out for some reason the rating is higher on that particular boat or design I don't see why it should race with the lower rating.

Note that this applies to handicap races only. On handicap I'll take any advantage I can get. And every single boat is entitled to its measured handicap.

So yes, the Viper *is* a F16, as my oldish Stealth is, after all they fit the box rule. But we have higher handicaps because the measured boat is what it is.

Now, if we are talking about a F16 event, like the UK TT our our nationals coming up next week end, well, there is no handicap there, first one over the line wins. If like me you have a slower boat, well, tough.