BioWares Eric Musco took on the forums to address the weapon tuning issues the swtor community have been talking about. Check it out:

Weapon Tunings | 05.04.2016, 02:05 PM

Hey folks,

I wanted to stop in to this thread and address some of the questions/concerns that have arisen since we introduced Weapon Tunings yesterday. First off, please keep the feedback coming. We have seen a lot of feedback relating to things like drop rates, adding the tuning to Collections, etc. The team is actively looking at all of your feedback and considering what future changes, if any, need to occur. Here are a few of the common questions we have seen:

Is the Weapon Tuning more rare than other rare items?

The Weapon Tuning’s drop rate is on par with most other rare items found in a pack. At times there are rare items which are exceedingly rare, such as the Unstable Lightsaber, but the Weapon Tuning is not one of them. As a note, we are looking at more clearly designating that extra rarity as Platinum in 4.5.

Are Weapon Tunings only going to drop from the Cartel Market?

Although we introduced the system through the Cartel Market, there are plans moving forward to have Weapon Tunings that are not a part of the Cartel Market. That being said, future packs will likely contain them as well.

My favorite item doesn’t have a Weapon Tuning Slot, will you be adding more?

Yup! In fact, we will be making a thread in the Suggestion Box forum where you can let us know specific weapons that you would like to see a Tuning Slot added to.

Thanks everyone.

-eric