I bought my used De Rosa Merak in 2023. The dealer that I bought it from, bike-room.com, did a great job of refurbishing and setting up everything. Some of the Campagnolo Super Record EPS components were brand new. On my first ride, after attaching the integrated bar/stem (Vision Metron 5D), and installing the wheels/tires (Fulcrum Airbeat 400, Vittoria Rubino Pro 700×28, the bike shifted and braked pretty much perfectly.
Now, I’ve ridden it about 4,800 miles. The only parts that I’ve replaced are a couple of sets of brake pads (Campagnolo DB-310) and the brake rotors (Campagnolo DB-160C3).
The only other problem was the Ergo Power rear disc brake lever was leaking brake fluid through the banjo fitting for the hose that goes from the lever to the caliper. Instead of looking for the Campagnolo hose brake screw that comes with two new o-rings ( Campagnolo EC-EK107), I measured them then bought a lifetime supply from McMaster-Carr. (9262K259 Oil-Resistant Buna-N O-Ring, 1.2 mm Wide, 6 mm ID, Packs of 50)
After a couple of thousand miles on the Campagnolo Super Record EPS front derailleur, I started dropping the chain, both when shifting to the inner chain ring and up to the outer chain ring. Campagnolo has great documentation – Diagnostics and troubleshooting electronic groupsets EPS – Internal Power Unit V2 / V3 / V4 (pdf)- for adjusting the zero setting and adjusting the riding settings of the derailleurs.
Basically, pressing the mode button for six seconds should give a solid purple light on the interface. After that, pressing once on the up or down shift levers on the left hand control will move the front derailleur 0.1 mm in either direction, respectively. I was able to prevent the front derailleur from over shifting onto the big chain ring, but I was still dropping the chain on the inner chain ring.
When I searched for a Campagnolo Super Record EPS 12 speed chain catcher, the first hit was for the K-Edge Pro Road Braze-on Chain Catcher. The compatibility specs say, “Not compatible with Campy EPS.”
Campagnolo calls their chain catcher, Chain Security Device (FD-SR203). Unfortunately, Campagnolo doesn’t make it anymore. I could take that to mean maybe you should just adjust your derailleurs correctly and you wouldn’t need a Chain Security Device. But I found it available at Total Cycling, in the UK. I ordered it and it was delivered to me in California in about a week.
Campagnolo has a technical manual (pdf) that includes instructions for mounting the Chain Security Device (if you understand the use of square nuts to fasten the front derailleur, let me know in the comments). I usually use the right tools in order to make things right but instead of buying the Campagnolo Front Derailleur Alignment Tool UT-FD120, I eyeballed it and it’s working perfectly. No more dropped chains.