Since getting back on the bike in August I've been tracking my FTP in wko+. Mostly by using a full bore 40k ride as my benchmark, a ride I call the "Billingshurst Loop". When I started in August it took me 1:27, my latest best is 1:15. I use the NP for this ride because it is a little lumpy (which is unavoidable where I live). The results tend to stack up very, very well with 20min turbo tests as well.
Whilst my target for FTP is basically "as high as I can get it" I still like to set targets and track progress towards them. Hence the graph. The linear and curved trend lines are based upon the data collected. I tend to believe that future progress will not be as dramatic as past progress so believe the end FTP of 290 is a reasonable target. However, the linear target of 320 is not impossible.
I'd be delighted with anything approaching 300w, and unlike in 2007, this time I know EXACTLY how many watts I do day to day. In 2007 I hit an FTP of 294w for an outdoor 40k test in April and then plateaued - so lets just see.