1. Maybe you're right about the Oliver thing. Still Barry is weak when he's confronted physically (which is evident in all previous episodes). If you've noticed Cisco talking to West, he told he saw "Red and Yellow lightnings" when F and RF was fighting in S.T.A.R labs, which piques up the interest of West in his mind. In Pilot episode, we saw same "Red and Yellow lightnings",when Barry's mom was killed. So it's possible that both F & RF travelled to past - RF with the intention to kill Barry's mom (so that Barry will have the grudge throughout his life, to fight against evil) and F with the intention to content RF from killing his mom or tampering with the timeline. We also saw Barry was ten blocks away, when his mother was killed. F should've had only one option - either to save his mom or his younger self.
- If he saves his younger self, his mom would get killed (RF wins here).
- If he saves his mom, RF may kill his Younger self and his future self will get erased from the timestream.
(What happens if Barry saves his mom, is the crux of Flashpoint event, which leads to the New-52 timeline in the DC Comics, which helped the DC to revolutionize and revisit most of the Superheroes ever created in DC world. As @SaiyanGoku suggested, you can see "Justice League: The Flashpoint Paradox" movie)
So, he might've saved his younger self to avenge for his mom's death in the long run.
2. Tina McGee told that the Tachyon prototype is for the future. Fitting the Tachyon prototype to Wells's Yellow suit may energize the suit to travel into the timestream (let's see what happens in the upcoming episodes). RF maybe the future self of Wells travelled into past (which is current timeline) to tease Flash that he exists. So, know there are 2 Wells with the current timeline and from future (as RF). It' also possible that RF maybe someone who is secretly working with Wells. In order to not create suspicions, they've arranged a beatdown where RF beat Wells in the power cage. If you noticed the scene carefully in the post credits where Wells smiles in a distorted voice, you can actually see the wounds healed within minutes between frames.
Thawne even asked West, "Why it (RF) didn't kill himself?". Is Thawne somehow become the RF in future with/without the help of Wells to avenge Barry for stealing Iris? (In comics, Barry and Iris are couples, and even had children. Barry at last expressed his love for Iris, though Iris kept quiet. . .)
So, who's RF - Eobard or Wells? Only time(stream) will tell
I wanted to know what was that metal thingthat heput up on the RF suit? And wells being RF is like impossible because he was there with others when RF appeared. Thawne being RF is somewhat better
so in short that was the tachyon wells put it on his suit? 
