Hey Scott - couple clarifications to your details above.Steve, as mentioned, yes it is for dual hydraulic controls. The "standard" one which it the implement lift (on a twin stick it is the inside stick, closest to the dash) that raises and lowers the implements. The "optional" one is to control the front hydraulic outlets (on a twin stick, it the outside stick). The only factory implement, that I know of was the hydro angled blade. I have a hydro angle blade also. It is really nice to be able to angle the blade from the seat. I did it the manual way for 40 years. I had the 1450 for nearly 10 before I got the hydro angle blade. I do have a picture of it mounted if you would like to see it.
Also, in the Quietline models:
1x00 model number (800, 1000, 1100, 1200) were the gear drive models. The 1100 was even unique itself....
1x50 model number (1050, 1250, 1450, 1650) were the hydro models. The 1450 and 1650 came standard with hydraulic lift and lights.