Dare I ask what a crank rebuild involves ?
Not that much but several different methods with a million do's and don'ts. A few specialised tools you need and some dial inducators.
Roughly you will check the crank for run out and most importantly the threaded end is straight and the centre point is intact. Scribe a few lines on it to reference, with your press plate inbetween the webs and supported press against the crankpin.
The crank is in half now, if you want to replace the crank pin here is the tricky bit, holding 1 crank web and putting a few tonnes onto the pin to get it out.
The next trick is to press the pin in at 90 deg to the web and parallel to the crank axis, I use a guide bush with the pin frozen and the web heated. Thrusts, rod and bearing are installed and then it's ready to go back together.
Most will have a jig or press tool to keep journals and webs in line again pin frozen web heated.
Then it's ready to true up, both axial and radial run out checked with dial indicators. Gently smacked with a copper/brass hammer and or squeezed in a vice.
Much better things to do on a saturday arvo
I wouldn't take my cranks anywhere else than to Frank but Darwin and Blacktown are a long way from Melbourne anyway so neither of us are helping Curtis with his need. I've never heard of the fella in Darwin but I have no doubt he's fine. It's just such a long way to send something that can be done locally.......that's my point.
Putting the crank in a $15 express post bag and a self addressed satchel inside it with $50 will get your crank done in a week or so. That passes my test for help.