It's a decent deal to join with the peerswap group and get the L-BTC that someone has already converted and hold that as a bank of rebalance source material. For sure, conversions back and forth are better when done at low fee time--and since this is just on-chain maintenance rather than node communication timeout based transactions, you don't have to worry that it MUST complete within a given timeframe (like you do with channel open) so you can process these in batch and at low fee when convenient.