If you bought the Alecto new you may find you get some grease discharge after a few day of shooting, I did with mine. It took a few felts to clean the gun out of the barrel and about a tin of pellets until it finally cleared out - might not be all of them but mine certainly had a lot of grease in it.
Re the red dots I fitted a Hawke 25 as it gives a fairly small dot, but thought it didn't suit the gun to well as it obscured the surrounding view.
I've just bought a Gun Tuff holographic type which seems to go with the gun better but as you rightly say it is a bit of a splat! It was about £19 of our sponsor, the dot is larger than the Hawke but its still giving good 2p coin size groups at 8 meters using two pumps, for anything further out I may have to look at alternatives - can you post up how you get on with the laser when it comes?
cheers
Ed