Perhaps a good set of collimation tools would be an excellent addition to your kit Steve. It's always best to be sure that your collimation is spot on before each session.
A Bahtinov mask fits over the end of your scope, and causes a particular pattern of diffraction spikes to show up in the eyepiece. As you reach perfect focus (usually on a brighter star) the diffraction pattern becomes symmetrical. It's a very easy way of achieving perfect focus.
I think there's a person on IIS who makes the masks. Also, you can get Astrozap ones known as Focusing Caps which double as lense caps (which I use), or make your own
here.
Dean