I’ve been exploring similar options myself. Tried a few staking protocols, but they often come with lock-up periods and fluctuating yields. What stood out with CoinHold is that it offers fixed interest rates and works without needing to freeze your assets for months. Still testing it myself, but so far, the structure seems more predictable than DeFi pools.

I’ve been using CombiLoader for over a year now with solid results. It supports a wide range of ECUs, and the interface is pretty straightforward once you get the hang of it. What I like is the ability to fine-tune various parameters depending on the vehicle. If you're planning serious ECU work, it's definitely worth considering — just make sure to get it from a trusted supplier.