Greetings from sunny South Africa. My Name is Greg Atlasik. I am highly proficient in Solidworks, Inventor, and AutoCAD. I would like to tender for your project. I, myself provide a 3d printing service with my own 3d printers for the public in RSA. I believe I can efficiently, professionally and cost effectively assist you with your model requirements.
With regards to your questions:
1.I have a Cubex duo 3d printer, i was pretty much forced to get the studio software to be more compaitble with the printer, - yes i have access, as for the years, I have only been working with that program since september last year, so about 5 months. But Solidworks, Inventor is 4 years and doing conversions between them and other programs probably about 2 years.
2. I work mainly with engineering however, have been working lately alot with model conversions.
I have done a few stl to iges conversions for injection moulding for clients in the USA. I can send you some screenshots or you can have a look at my portfolio.
3. As mentioned, I have done conversions for injection moulding. There are a few programs that claim to do the conversions, but they loose detail and scale.
Hope to hear from you soon.