[DampRobot]

Some other CAD commentary for you to mull over (now that Travis won't be your friend anymore...):

It seemed like a lot of your sketches for parts put essentially all part geometry into one sketch. I'm not saying that the way you're doing it is wrong or bad, but I've always been taught that having multiple 3d features produces a more robust and adaptable model than including a lot of complication in sketches. Additionally, I hope that when I teach kids to CAD with a lot of features (for example on frame tubing, first the profile extrusion, then any wheel holes, then top gusset holes, then gearbox holes, etc), that they realize that the way they model a part should reflect what depends on what and how it will actually be manufactured. Of course, I can definitely see how you might find putting a lot of stuff in a sketch faster.

Also, I'm totally in the same boat a you for construction geometry. It's a really neat and agile tool which you can always find clever ways to use.

Finally, for those situations where you want to put a fillet somewhere where there are two edges so close together that it would break the normal fillet command, use face fillet mode. You have to manually select the two faces you want to "join"with a fillet, but it is generally a much more robust tool. It's great for forcing all those weird fillets where the edges don't quite work out right.