Many thanks to Ali usta for his professionalism and knowledge, he brought the Ultegra di2 road bike for assembly and cleaning. All the parts were dismantled and washed by hand, old oils were cleaned, tooth sealant was applied, copper grease or lithium was applied to the required places, the bike was delivered into the hands of a professional. All bolts were tightened with a torque wrench. Original Shimano oils are used. The master, who is also interested in bicycle racing and became the Turkish champion in 2012, knows very well what and how he should do. Many cyclists go to him! I always recommend this service!