Question about Tacsofts Options

[Dolanar]

Hello All,
I have an Adept Sniper & have been reading a bit more about Tacsofts & how they can be beneficial to my character type, however being an Adept I am much less inclined to add Cyber to my arsenal of abilities as it weakens me a bit.

After reading through the description of Tacnets & such I find myself a bit confused on what exactly counts as a channel, the example gives some options that don't seem like a Channel sense. So as an Adept looking into Tacnets, what kind of senses should I make sure to have to reach the maximum of 8?

Also, I have a tendency to use smaller drone's as they are much harder to see & flying eyes have some uses, but if I were to use Flying Eyes & wanted to get a +4 alone I'd need to give them an 8 Sensor, is it possible for Flying Eyes to have an 8 sensor, if so, what kind of Sensor's do you recommend on a Micro/Mini drone to reach 8?

Any help is appreciated, I am fairly new to Shadowrun as a whole & am still adjusting to the system so I am always interested in different ideas to look into.