Yes, Rocket Lab is blowing up engines. No, it’s not a big deal, CEO says.

In response to a query from Ars about the engine test anomalies, Rocket Lab Chief Executive Officer Pete Beck downplayed concerns.
SpaceNews

Rocket Lab Successfully Completes First Test Fire of Reused Rutherford Engine

Rocket Lab USA, Inc (Nasdaq: RKLB) (“Rocket Lab”, or “the Company”), a leading launch and space systems company, has successfully test fired a reused Rutherford first stage engine for the first time – ...
CSR Wire

Cummins Plant Begins Building Prototype of Fuel Agnostic Engines To Prepare for Production

Plant personnel made upgrades to the VPI Lab to replicate the production environment for building the prototype engines. Run by two engineers, seven technicians and supported by a large ...