diff --git a/docs/Architecture.md b/docs/Architecture.md
index 2f3b36a..3b0ac7a 100644
--- a/docs/Architecture.md
+++ b/docs/Architecture.md
@@ -19,11 +19,9 @@ At the highest level, we recognise the following functional components, with the
 
 ```mermaid
 flowchart LR
-A(GpioTimerService.js) -->|time between ticks| B(server.js)
+A(GpioTimerService.js) -->|time between ticks| B(server.js) & B(server.js) -->|Heart rate data| D(RowingStatistics.js) & D(RowingStatistics.js) -->|Rowing metrics| B(server.js)
 C(PeripheralManager.js) -->|Heart rate data| B(server.js)
 B(server.js) -->|time between ticks| D(RowingStatistics.js)
-B(server.js) -->|Heart rate data| D(RowingStatistics.js)
-D(RowingStatistics.js) -->|Rowing metrics| B(server.js)
 B(server.js) -->|Rowing metrics| E(PeripheralManager.js)
 E(PeripheralManager.js) -->|Rowing metrics| F(ANT+ clients)
 E(PeripheralManager.js) -->|Rowing metrics| G(BLE clients)