Do you have a drop dead date in mind?
For those who have been holding off on making changes to their cars (me for example), if the rules come out after say August of this year, I'd say it will be tough to really get things taken care of by spring 2018. Heck, I would like to have known last August for the 2018 season. Depending on how it works out, some things are harder to plan for such as budgets...
I'm trying to figure out what I'll need to do to my car to be competitive in TT6(or TT5) for next year and then see what's left in the budget for entry fees and such. If the rules of 5 and 6 are very similar to 4..such as adding in some tire size modifiers, weight modifiers, and oem aero vs aero breaks, then I could convert my car from E to 6 fairly easily.....assuming 6 will be somewhere around 16-17:1 weight to avg rwhp ratio.
So the sooner I know the rule set, the better I can prepare and ultimately save $$ in the long-run.[/quote]
In for a guess on this as well. FYI- Looking forward to the switch.