I am fairly new to professional corset making, (as opposed to making them for myself and family for many years) and have been approached about making a corset for a male to female transgender ( pre-operation ) customer. I am quite willing to do so, but have no experience in this area. I have read the article on making corsets for the male form, and this help with how to measure and fit men, but I would love any suggestions for helping her to achieve the female form without causing problems with the male anatomy. If it makes a difference the customer is slightly overweight.

Thanks for any help you can give!

I would make sure you do a mock up - and you will probably be pleasantly surprised at how little difference there is as long as you keep in mind that the rib cage comes down lower.
A couple of years back I was pretty scared about accepting a commission for a male corset, and when I asked for advice I was flamed for it hugely which put me off even more, but when I finally bit the bullet and worked with a transgender friend of mine on a corset to give her killer curves, I found she was much more curvy in a corset than some biologically female customers I have had.
Sorry if this is not the answer you were looking for in terms of advice, but from my experience a mock up to identify how curvy the client is able to be in a corset comfortably will go miles

I have a few clients who are TG, for the most part it really is a lt like standard custom drafting, I just keep in mind that the ribcage is longer, and a bit firmer (at least with my clients). Also remember that the hips to tend to shallower, and to watch hw deep ge front goes for re op. with the client being a little larger you should be able to sculpt beautiful curves.

Actually, this is exactly the answer I was hoping for. I always do mockups for my clients. I was just afraid I might pinch a nerve or something else that would cause my client problems. Thanks for the reassurance.