The first thing I ever made with it were some stainless brake pistons for an ST1100. Now for the GS I've made a trigger wheel for a Microsquirt ignition. Here is one example drawing:

The cost to make 1 part is usually very high, but if say 5 or more people need the same thing, it would likely be cost-effective. As such, this would need to be a group purchase scenario. To give an example, one of the trigger wheels above is about $100. If I can make/sell 5, they could be sold for a fraction of this, perhaps $30.
The nice thing about customization is that it will work where other stuff will not, or not as easily. The trigger wheel I have designed will press onto the OEM trigger tooth and use the stock pickup.
I'm offering this as a sideline type of service to share my abilities. I'll need to make a few bucks on any deal, as like most I cannot give stuff away.
PM me or reply here if interested.