I have to agree with zz0468 here. I'm not sure I understand what you're looking for here. There's no question in your original post, but your "no one?" response sounds like you're looking for people's input. What input are you looking for?
If you're just looking for comments about what you posted, again I'll agree with zz0468. Two cheap toy radios hooked up together as a repeater equals a cheap toy repeater. Sure, it will work for temporary use, but it's not going to perform well enough to be used as a dedicated, long term repeater.
Unless the receive and transmit antennas are pretty far apart from each other, or an expensive set of duplexer cans are used, the transmit radio will desence the receive radio. Power output will be just a few Watts, so even with a high gain antenna you're not going to get much distance out of it. Plus, handheld radios (especially cheap China radios) are not designed for a high amount of duty cycle, so if you use this "repeater" for more than a few minuets at a time you're going to burn up the transmitting radio.
Furthermore, unless you add some kind of controller or automatic identifier, how are you going to fulfill the requirement of the transmitter broadcasting the call sign of the repeater?
If I've missed the point of your post, and you have questions that you'd like answered, please let us know. We'll be glad to help you. But if you're just looking for comments that say "Ohhh Ahhhh how cool is that? You made a repeater out of two $35 radios!" You're probably not going to get many of those comments.