SSD + HD 2011 iMac convert to double SSD - options ?

I have a successful 2011 iMac with a 256G SSD boot drive and a 3TB Hard Drive. The HDD spinning up on wake drives me nuts and 1TB SSD's are in the $400 range so I'd like to just ditch the Hard Drive. My SSD sits behind the optical drive right now. It's been a few years now and I had a local mac shop do the work (in my own attempt,I broke a small part on the MB). The shop used a separate sensor part to solve the fan spin issue.

I'd like to not remove the motherboard if possible. I can deal with 1 big SSD or preferably 2 SSD's. What are my options ? If I replace the existing HDD with an SSD, do I need to replace the sata cable and to pull the MB (as well as kludge a sensor) ? Alternatively, can I just pull the HDD altogether and replace my 256gB with a 1TB SSD ?

Anyone ? Maybe I'm better off upgrading the SSD

I also wonder if I just unplug the hard drive if I'll still have fan issues.

Found at least one option

http://eshop.macsales.com/item/OWC/DIDIMACHDD11/

I remember talk a few years ago of pinning out the fan controller if you were using an SSD so maybe there's a budget solution but at least this one will work.

OWC In-line Digital Thermal Sensor doesn't work

By "will not work" do you mean doesn't physically fit into the SSD connector or the temperature sensor doesn't properly function ?

Did OWC help any with the part not working ? It's not a cheap connector.