Excellent for a first try. You must be a quick learner with LTS! I'm a fairly recent convert and still learning. It has its quirks, and the 'help' could be more helpful, but hey....it's free, so we shouldn't complain! Where did you find the nice 4020 and 4093 symbols? I was using ones downloaded from the Yahoo LTS-users group.
I haven't found the trimpot yet either, in the LTS files, but a potentiometer model is available from the Yahoo group.
Yes, you've got the reset spot on.
A couple of things though:-
(a) For the 4093 the unused input pins (8,9,12,13) should be grounded and the output pins (10,11) shouldn't.
(b) I haven't analysed the pendulum circuit in detail, and at a quick glance can't grasp what its intended operation is. Should Q2 be an NPN and the 'other way up'?