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PDI's aren't the best springs to start with, the consistency from spring to spring with the same rating is fairly large and they use the old linear design. Springs from other companies (Prometheus, SystemA, HurricanE, etc.) have the non linear design (the amount the spring compresses at different points along its length are different) that give much more consistent fps both between springs and between shots.
The closest thing to a PDI 170% in non-linear is an M120 meaning its designed to shoot 120m/s. What version mechbox is this in? A spring of that strength will blow apart a stock TM ver.2 fairly quickly so you'd need a reinforced mechbox or a different version.
I think an EG1000 will push a PDI 170% or an M120 but I'm unsure about the mini battery, you will have a damn slow rate of fire if nothing else. I recommend either a weaker spring (M110) or a large battery...or both. I will repeat what many of the most experienced Canadian players have said: the field limit for velocity is a LIMIT, not a GOAL (I only say this because a PDI 170% will bring you right up to ~400fps, the limit at most fields)
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