Redstone Rigg, perchance?
Your new favourite hill? That would be an option ...
I'd be up for the Sunday ride if you're headed over Redstone Rigg way. If you're passing through Dalkeith or Cousland on your way out can you give me a shout?
We'll post more details nearer the time, including some meeting places, and we can swap mobile numbers via PM to arrange for "fly-
slog-past" times. In case you haven't experienced yet how CC Ecosse rides are arranged, prepare of PAGES of fun

.
Unless you know of anything steeper?
hmmm ... HLaB might know this - is the Polton Mill (western) slope steeper?
Combining both for a proper test would probably be a bit too far for a leisurely Sunday ride, for me anyway
About going east, the wind is predicted to be from a northerly direction at the weekend, so we may want to take the opportunity to get blown up Redstone Rigg

(wind-assisted climbing anybody

?). Shorter & longer options available, either heading out from Edinburgh or starting from Longniddry train station ...
[Free parking available near our place for those thinking of driving to Edinburgh]
The other idea I had was to go south (via Dalkeith?) and follow the NCN1 from Lasswade up to the viewpoint on the Moorfoots, and returning via Polton Mill if anybody fancies trying the steepest hill nearby that I can think of.
T