[Meir]

adding a switch like that, to the same location of the 4th stalk, can be also a very interesting option.

https://www.amazon.com/TmallTech-Switch-Position-Contacts-Momentary/dp/B018JNFXT2/ref=sr_1_1?ie=UTF8&qid=1478632142&sr=8-1&keywords=4+positions+momentary+switch

https://www.amazon.com/0-6A-125V-Latching-Joystick-Switch/dp/B009N83ATI/ref=pd_day0_60_8?ie=UTF8&pd_rd_i=B009N83ATI&pd_rd_r=NZJXRNHQAG4M07G887R2&pd_rd_w=vHZVW&pd_rd_wg=r69v7&psc=1&refRID=NZJXRNHQAG4M07G887R2