täyspuihin

Could you clarify what you mean by "täyspuihin"? It could refer to different things depending on context (for example, it's similar to Finnish terms related to solid wood, it could be a place name, or a niche concept in a particular field). If you specify the intended meaning or field, I can write a concise, neutral Wikipedia-style article under 300 words. If you don’t have a context, I can provide a neutral overview of the Finnish carpentry/forestry interpretation related to solid wood. Which would you prefer?