Gabriel reads the request with it's attached file and says to the camera, "Well Jeff, I usually don't let people visit me, but boy, that's a big donation, so I'll send you my address." Secretly however the main reason why he gave Jeff his address is a rendering of a form he wanted to get himself turned into.
"So while we wait for Jeff, let's try the file he sent me". He loaded up the file and applied it. His mechanical member was already fairly well extended when the changes started. At first the skin of his legs started to smooth out up to about where his belt would be. Gabriel touched the smooth surface and it felt like rubber. Stroking over it excited him which caused him to moan. He tried to wiggle his toes, but as the changes progressed they started to melt into each other, turning into a solid mass. Then the inside of his thighs turned black with that black region growing upwards around his box-like groin as two separate strips only to join around his ass and back from behind. The outside of them turned olive green, and a green stripe extended from his groin around his waist forming a sort of belt as well as a plate covering much of his ass. Around his knees another black ring formed, with the area above and below it turning that olive green.
As the basic changes happened, details slowly started to form. The black parts gradually turned into a very hard, yet still somehow flexible rubber, protected by segments of armor plating while the green parts turned into into straight metal armor plating. On the outside of his thighs and the belt, mounting points appeared. Gabriel thought that they might be for guns or other kinds of weapons. At his feet the armor plating formed boot like structures, with a black sole and segmented parts to give them some flexibility as well as a joint to connect them to the lower legs. On his knees something like protectors formed.
As the changes finished Gabriel realized that his lower body was now a machine. He reached around his new metallic belt and realized that it seamlessly merged with his skin with no gap in between. Then he reached back to his bum which had its lower part covered in what felt like hard rubber with the upper part covered in a metallic plate. That plate however had a roughly 2 inch diameter port in it. With a mental command he managed to open it and pushed his finger into it. Touching the inside of it sent shivers of ecstasy though his body.
But then...