Red Bull have certainly had their challenges in the second pre-season test in Bahrain this week and while engine-partner, Renault Sport F1, has offered mea culpa on their issues post-Jerez, they still feel they've made progress in Bahrain. Red Bull have offered their own guilty plea for having technical issues that have nothing to do with Renault's power plant but ultimately the teams running the French engine-maker's product have felt the system is behind its competition. Renault said: What were the key steps taken between Jerez and Bahrain ? We made a number of specification changes to the Energy Store (battery), involving modified hardware, requiring some gymnastics in engineering,...
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